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ACROTIC A*crotic, a. Etym: [Gr. (Med.) Defn: Pertaining to or affecting the surface.


ACROTISM Acro*tism, n. Etym: [Gr. (Med.) Defn: Lack or defect of pulsation.


ACROTOMOUS A*croto*mous, a. Etym: [Gr. (Min.) Defn: Having a cleavage parallel with the base.


ACRYLIC A*crylic, a. (Chem.) Defn: Of or containing acryl, the hypothetical radical of which acrolein is the hydride; as, acrylic acid.


ACT Act, n. Etym: [L. actus, fr. agere to drive, do: cf. F. acte. See Agent.] 1. That which is done or doing; the exercise of power, or the effect, of which power exerted is the cause; a performance; a deed. That best portion of a good man's life, His little, nameless, unremembered acts Of kindness and of love. Wordsworth. Hence, in specific uses: (a) The result of public deliberation; the decision or determination of a legislative body, council, court of justice, etc.; a decree, edit, law, judgment, resolve, award; as, an act of Parliament, or of Congress. (b) A formal solemn writing, expressing that something has been done. Abbott. (c) A performance of part of a play; one of the principal divisions of a play or dramatic work in which a certain definite part of the action is completed. (d) A thesis maintained in public, in some English universities, by a candidate for a degree, or to show the proficiency of a student. 2. A state of reality or real existence as opposed to a possibility or possible existence. [Obs.] The seeds of plants are not at first in act, but in possibility, what they afterward grow to be. Hooker. 3. Process of doing; action. In act, in the very doing; on the point of (doing). In act to shoot. Dryden. This woman was taken . . . in the very act. John viii. 4. Act of attainder. (Law) See Attainder. -- Act of bankruptcy (Law), an act of a debtor which renders him liable to be adjudged a bankrupt. -- Act of faith. (Ch. Hist.) See Auto-da-F?. -- Act of God (Law), an inevitable accident; such extraordinary interruption of the usual course of events as is not to be looked for in advance, and against which ordinary prudence could not guard. -- Act of grace, an expression often used to designate an act declaring pardon or amnesty to numerous offenders, as at the beginning of a new reign. -- Act of indemnity, a statute passed for the protection of those who have committed some illegal act subjecting them to penalties. Abbott. -- Act in pais, a thing done out of court (anciently, in the country), and not a matter of record. Syn. -- See Action.


ACT Act, v. t. [imp. & p. p. Acted; p. pr. & vb. n. Acting.] Etym: [L. actus, p. p. of agere to drive, lead, do; but influenced by E. act, n.] 1. To move to action; to actuate; to animate. [Obs.] Self-love, the spring of motion, acts the soul. Pope. 2. To perform; to execute; to do. [Archaic] That we act our temporal affairs with a desire no greater than our necessity. Jer. Taylor. Industry doth beget by producing good habits, and facility of acting things expedient for us to do. Barrow. Uplifted hands that at convenient times Could act extortion and the worst of crimes. Cowper. 3. To perform, as an actor; to represent dramatically on the stage. 4. To assume the office or character of; to play; to personate; as, to act the hero. 5. To feign or counterfeit; to simulate. With acted fear the villain thus pursued. Dryden. To act a part, to sustain the part of one of the characters in a play; hence, to simulate; to dissemble. -- To act the part of, to take the character of; to fulfill the duties of.


ACT Act, v. i. 1. To exert power; to produce an effect; as, the stomach acts upon food. 2. To perform actions; to fulfill functions; to put forth energy; to move, as opposed to remaining at rest; to carry into effect a determination of the will. He hangs between, in doubt to act or rest. Pope. 3. To behave or conduct, as in morals, private duties, or public offices; to bear or deport one's self; as, we know not why he has acted so. 4. To perform on the stage; to represent a character. To show the world how Garrick did not act. Cowper. To act as or for, to do the work of; to serve as. -- To act on, to regulate one's conduct according to. -- To act up to, to equal in action; to fulfill in practice; as, he has acted up to his engagement or his advantages.


ACTABLE Acta*ble, a. Defn: Capable of being acted. Tennyson.


ACTINAL Acti*nal, a. Etym: [Gr. (Zo?l.) Defn: Pertaining to the part of a radiate animal which contains the mouth. L. Agassiz.


ACTINARIA Ac`ti*nari*a, n. pl. Etym: [NL., from Gr. (Zo?l.) Defn: A large division of Anthozoa, including those which have simple tentacles and do not form stony corals. Sometimes, in a wider sense, applied to all the Anthozoa, expert the Alcyonaria, whether forming corals or not.


ACTING Acting, a. 1. Operating in any way. 2. Doing duty for another; officiating; as, an superintendent.


ACTINIA Ac*tini*a, n.; pl. L. Actini?, E. Actinias. Etym: [Latinized fr. Gr. (Zo?l.) (a) An animal of the class Anthozoa, and family Actinid?. From a resemblance to flowers in form and color, they are often called animal flowers and sea anemones. [See Polyp.]. (b) A genus in the family Actinid?.


ACTINIC Ac*tinic, a. Defn: Of or pertaining to actinism; as, actinic rays.


ACTINIFORM Ac*tini*form, a. Etym: [Gr. -form.] Defn: Having a radiated form, like a sea anemone.


ACTINISM Actin*ism, n. Etym: [Gr. Defn: The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.


ACTINIUM Ac*tini*um, n. Etym: [Gr. (Chem.) Defn: A supposed metal, said by Phipson to be contained in commercial zinc; -- so called because certain of its compounds are darkened by exposure to light.


ACTINO-CHEMISTRY Ac`ti*no-chemis*try, n. Defn: Chemistry in its relations to actinism. Draper.


ACTINOGRAM Ac*tino*gram, n. [Gr. , , ray + -gram.] Defn: A record made by the actinograph.


ACTINOGRAPH Ac*tino*graph, n. Etym: [Gr. -graph.] Defn: An instrument for measuring and recording the variations in the actinic or chemical force of rays of light. Nichol.


ACTINOID Actin*oid, a. Etym: [Gr. -oid.] Defn: Having the form of rays; radiated, as an actinia.


ACTINOLITE Ac*tino*lite, n. Etym: [Gr. -lite.] (Min.) Defn: A bright green variety of amphibole occurring usually in fibrous or columnar masses.


ACTINOLITIC Ac`tin*o*litic, a. (Min.) Defn: Of the nature of, or containing, actinolite.


ACTINOLOGY Ac`ti*nolo*gy, n. Etym: [Gr. -logy.] Defn: The science which treats of rays of light, especially of the actinic or chemical rays.


ACTINOMERE Ac*tino*mere, n. Etym: [Gr. (Zo?l.) Defn: One of the radial segments composing the body of one of the Coelenterata.


ACTINOMETER Ac`ti*nome*ter, n. Etym: [Gr. -meter] (a) An instrument for measuring the direct heating power of the sun's rays. (b) An instrument for measuring the actinic effect of rays of light.


ACTINOMETRIC Ac`ti*no*metric, a. Defn: Pertaining to the measurement of the intensity of the solar rays, either (a) heating, or (b) actinic.


ACTINOMETRY Ac`ti*nome*try, n. 1. The measurement of the force of solar radiation. Maury. 2. The measurement of the chemical or actinic energy of light. Abney.


ACTINOMYCOSIS Ac`ti*no*my*cosis, n. [NL.] (Med.) Defn: A chronic infectious disease of cattle and man due to the presence of Actinomyces bovis. It causes local suppurating tumors, esp. about the jaw. Called also lumpy jaw or big jaw. -- Ac`ti*no*my*cotic (#), a.


ACTINOPHONE Ac*tino*phone, n. [Gr. , , ray + voice.] (Physics) Defn: An apparatus for the production of sound by the action of the actinic, or ultraviolet, rays.


ACTINOPHONIC Ac*tin`o*phonic, a. (Physics) Defn: Pertaining to, or causing the production of, sound by means of the actinic, or ultraviolet, rays; as, actinophonic phenomena.


ACTINOPHOROUS Ac`ti*nopho*rous, a. Etym: [Gr. Defn: Having straight projecting spines.


ACTINOSOME Ac*tino*some, n. Etym: [Gr. (Zo?l.) Defn: The entire body of a coelenterate.


ACTINOST Actin*ost, n. Etym: [Gr. Defn: (Anat.) One of the bones at the base of a paired fin of a fish.


ACTINOSTOME Ac*tino*stome, n. Etym: [Gr. (Zo?l.) Defn: The mouth or anterior opening of a coelenterate animal.


ACTINOTROCHA Ac`ti*notro*cha, n. pl. Etym: [NL.; Gr. (Zo?l.) Defn: A peculiar larval form of Phoronis, a genus of marine worms, having a circle of ciliated tentacles.


ACTINOZOA Acti*no*zoa, n. pl. Etym: [Gr. (Zo?l.) Defn: A group of Coelenterata, comprising the Anthozoa Ctenophora. The sea anemone, or actinia, is a familiar example.


ACTINOZOAL Ac`ti*no*zoal, a. (Zo?l.) Defn: Of or pertaining to the Actinozoa.


ACTINOZOON; ACTINOZOOEN Acti*no*zo?n, n. (Zo?l.) Defn: One of the Actinozoa.


ACTINULA Ac*tinu*la, n. pl. Etym: [NL., fr. Gr. (Zo?l.) Defn: A kind of embryo of certain hydroids (Tubularia), having a stellate form.


ACTION Action, n. Etym: [OF. action, L. actio, fr. agere to do. See Act.] 1. A process or condition of acting or moving, as opposed to rest; the doing of something; exertion of power or force, as when one body acts on another; the effect of power exerted on one body by another; agency; activity; operation; as, the action of heat; a man of action. One wise in council, one in action brave. Pope. 2. An act; a thing done; a deed; an enterprise. (pl.): Habitual deeds; hence, conduct; behavior; demeanor. The Lord is a Good of knowledge, and by him actions are weighed. 1 Sam. ii. 3. 3. The event or connected series of events, either real or imaginary, forming the subject of a play, poem, or other composition; the unfolding of the drama of events. 4. Movement; as, the horse has a spirited action. 5. (Mech.) Defn: Effective motion; also, mechanism; as, the breech action of a gun. 6. (Physiol.) Defn: Any one of the active processes going on in an organism; the performance of a function; as, the action of the heart, the muscles, or the gastric juice. 7. (Orat.) Defn: Gesticulation; the external deportment of the speaker, or the suiting of his attitude, voice, gestures, and countenance, to the subject, or to the feelings. 8. (Paint. & Sculp.) Defn: The attitude or position of the several parts of the body as expressive of the sentiment or passion depicted. 9. (Law) (a) A suit or process, by which a demand is made of a right in a court of justice; in a broad sense, a judicial proceeding for the enforcement or protection of a right, the redress or prevention of a wrong, or the punishment of a public offense. (b) A right of action; as, the law gives an action for every claim. 10. (Com.) Defn: A share in the capital stock of a joint-stock company, or in the public funds; hence, in the plural, equivalent to stocks. [A Gallicism] [Obs.] The Euripus of funds and actions. Burke. 11. An engagement between troops in war, whether on land or water; a battle; a fight; as, a general action, a partial action. 12. (Music) Defn: The mechanical contrivance by means of which the impulse of the player's finger is transmitted to the strings of a pianoforte or to the valve of an organ pipe. Grove. Chose in action. (Law) See Chose. -- Quantity of action (Physics), the product of the mass of a body by the space it runs through, and its velocity. Syn. -- Action, Act. In many cases action and act are synonymous; but some distinction is observable. Action involves the mode or process of acting, and is usually viewed as occupying some time in doing. Act has more reference to the effect, or the operation as complete. To poke the fire is an act, to reconcile friends who have quarreled is a praiseworthy action. C. J. Smith.


ACTIONABLE Action*a*ble, a. Etym: [Cf. LL. actionabilis. See Action.] Defn: That may be the subject of an action or suit at law; as, to call a man a thief is actionable.


ACTIONABLY Action*a*bly, adv. Defn: In an actionable manner.


ACTIONARY; ACTIONIST Action*a*ry, Action*ist, n. Etym: [Cf. F. actionnaire.] (Com.) Defn: A shareholder in joint-stock company. [Obs.]


ACTIONLESS Action*less, a. Defn: Void of action.


ACTIVATE Acti*vate, v. t. Defn: To make active. [Obs.]


ACTIVE Active, a. Etym: [F. actif, L. activus, fr. agere to act.] 1. Having the power or quality of acting; causing change; communicating action or motion; acting; -- opposed to Ant: passive, that receives; as, certain active principles; the powers of the mind. 2. Quick in physical movement; of an agile and vigorous body; nimble; as, an active child or animal. Active and nervous was his gait. Wordsworth. 3. In action; actually proceeding; working; in force; -- opposed to quiescent, dormant, or extinct; as, active laws; active hostilities; an active volcano. 4. Given to action; constantly engaged in action; energetic; diligent; busy; -- opposed to dull, sluggish, indolent, or inert; as, an active man of business; active mind; active zeal. 5. Requiring or implying action or exertion; -- opposed to Ant: sedentary or to Ant: tranquil; as, active employment or service; active scenes. 6. Given to action rather than contemplation; practical; operative; - - opposed to Ant: speculative or Ant: theoretical; as, an active rather than a speculative statesman. 7. Brisk; lively; as, an active demand for corn. 8. Implying or producing rapid action; as, an active disease; an active remedy. 9. (Gram.) (a) Applied to a form of the verb; -- opposed to Ant: passive. See Active voice, under Voice. (b) Applied to verbs which assert that the subject acts upon or affects something else; transitive. (c) Applied to all verbs that express action as distinct from mere existence or state. Active capital, Active wealth, money, or property that may readily be converted into money. Syn. -- Agile; alert; brisk; vigorous; nimble; lively; quick; sprightly; prompt; energetic.


ACTIVELY Active*ly, adv. 1. In an active manner; nimbly; briskly; energetically; also, by one's own action; voluntarily, not passively. 2. (Gram.) Defn: In an active signification; as, a word used actively.


ACTIVENESS Active*ness, n. Defn: The quality of being active; nimbleness; quickness of motion; activity.


ACTIVITY Ac*tivi*ty, n.; pl. Activities. Etym: [Cf. F. activit?, LL. activitas.] Defn: The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities. The activity of toil. Palfrey. Syn. -- Liveliness; briskness; quickness.


ACTLESS Actless, a. Defn: Without action or spirit. [R.]


ACTON Acton, n. Etym: [OF. aketon, auqueton, F. hoqueton, a quilted jacket, fr. Sp. alcoton, algodon, cotton. Cf. Cotton.] Defn: A stuffed jacket worn under the mail, or (later) a jacket plated with mail. [Spelled also hacqueton.] [Obs.] Halliwell. Sir W. Scott.


ACTOR Actor, n. Etym: [L. actor, fr. agere to act.] 1. One who acts, or takes part in any affair; a doer. 2. A theatrical performer; a stageplayer. After a well graced actor leaves the stage. Shak. 3. (Law) (a) An advocate or proctor in civil courts or causes. Jacobs. (b) One who institutes a suit; plaintiff or complainant.


ACTRESS Ac`tress, n. Etym: [Cf. F. actrice.] 1. A female actor or doer. [Obs.] Cockeram. 2. A female stageplayer; a woman who acts a part.


ACTUAL Actu*al (#; 135), a. Etym: [OE. actuel, F. actuel, L. actualis, fr. agere to do, act.] 1. Involving or comprising action; active. [Obs.] Her walking and other actual performances. Shak. Let your holy and pious intention be actual; that is . . . by a special prayer or action, . . . given to God. Jer. Taylor. 2. Existing in act or reality; really acted or acting; in fact; real; -- opposed to potential, possible, virtual, speculative, coceivable, theoretical, or nominal; as, the actual cost of goods; the actual case under discussion. 3. In action at the time being; now exiting; present; as the actual situation of the country. Actual cautery. See under Cautery. -- Actual sin (Theol.), that kind of sin which is done by ourselves in contradistinction to original sin. Syn. -- Real; genuine; positive; certain. See Real.


ACTUAL Actu*al, n. (Finance) Defn: Something actually received; real, as distinct from estimated, receipts. [Cant] The accounts of revenues supplied . . . were not real receipts: not, in financial language, actuals, but only Egyptian budget estimates. Fortnightly Review.


ACTUALIST Actu*al*ist, n. Defn: One who deals with or considers actually existing facts and conditions, rather than fancies or theories; -- opposed to idealist. J. Grote.


ACTUALITY Ac`tu*ali*ty, n.; pl. Actualities. Defn: The state of being actual; reality; as, the actuality of God's nature. South.


ACTUALIZATION Ac`tu*al*i*zation, n. Defn: A making actual or really existent. [R.] Emerson.


ACTUALIZE Actu*al*ize, v. t. Defn: To make actual; to realize in action. [R.] Coleridge.


ACTUALLY Actu*al*ly, adv. 1. Actively. [Obs.] Neither actually . . . nor passively. Fuller. 2. In act or in fact; really; in truth; positively.


ACTUALNESS Actu*al*ness, n. Defn: Quality of being actual; actuality.


ACTUARIAL Ac`tu*ari*al, a. Defn: Of or pertaining to actuaries; as, the actuarial value of an annuity.


ACTUARY Actu*a*ry, n.; pl. Actuaries. Etym: [L. actuarius copyist, clerk, fr. actus, p. p. of agere to do, act.] 1. (Law) Defn: A registar or clerk; -- used originally in courts of civil law jurisdiction, but in Europe used for a clerk or registar generally. 2. The computing official of an insurance company; one whose profession it is to calculate for insurance companies the risks and premiums for life, fire, and other insurances.


ACTUATE Actu*ate, v. t. [imp. & p. p. Actuated; p. pr. & vb. n. Actuating.] Etym: [LL. actuatus, p. p. of actuare, fr. L. actus act.] 1. To put into action or motion; to move or incite to action; to influence actively; to move as motives do; -- more commonly used of persons. Wings, which others were contriving to actuate by the perpetual motion. Johnson. Men of the greatest abilities are most fired with ambition; and, on the contrary, mean and narrow minds are the least actuated by it. Addison. 2. To carry out in practice; to perform. [Obs.] To actuate what you command. Jer. Taylor. Syn. -- To move; impel; incite; rouse; instigate; animate.


ACTUATE Actu*ate, a. Etym: [LL. actuatus, p. p. of actuare.] Defn: Put in action; actuated. [Obs.] South.


ACTUATION Ac`tu*ation, n. Etym: [Cf. LL. actuatio.] Defn: A bringing into action; movement. Bp. Pearson.


ACTUATOR Actu*a`tor, n. Defn: One who actuates, or puts into action. [R.] Melville.


ACTUOSE Actu*ose`, a. Etym: [L. actuosus.] Defn: Very active. [Obs.]


ACTUOSITY Ac`tu*osi*ty, n. Defn: Abundant activity. [Obs.] Dr. H. More.


ACTURE Acture, n. Defn: Action. [Obs.] Shak.


ACTURIENCE Ac*turi*ence, n. Etym: [A desid. of L. agere, actum, to act.] Defn: Tendency or impulse to act. [R.] Acturience, or desire of action, in one form or another, whether as restlessness, ennui, dissatisfaction, or the imagination of something desirable. J. Grote.


ACUATE Acu*ate, v. t. Etym: [L. acus needle.] Defn: To sharpen; to make pungent; to quicken. [Obs.] [To] acuate the blood. Harvey.


ACUATE Acu*ate, a. Defn: Sharpened; sharp-pointed.


ACUATION Ac`u*ation, n. Defn: Act of sharpening. [R.]


ACUITION Ac`u*ition, n. Etym: [L. acutus, as if acuitus, p. p. of acuere to sharpen.] Defn: The act of sharpening. [Obs.]


ACUITY A*cui*ty, n. Etym: [LL. acuitas: cf. F. acuit?.] Defn: Sharpness or acuteness, as of a needle, wit, etc.


ACULEATE A*cule*ate, a. Etym: [L. aculeatus, fr. aculeus, dim. of acus needle.] 1. (Zo?l.) Defn: Having a sting; covered with prickles; sharp like a prickle. 2. (Bot.) Defn: Having prickles, or sharp points; beset with prickles. 3. Severe or stinging; incisive. [R.] Bacon.


ACULEATED A*cule*a`ted, a. Defn: Having a sharp point; armed with prickles; prickly; aculeate.


ACULEIFORM A*cule*i*form, a. Defn: Like a prickle.


ACULEOLATE A*cule*o*late, a. Etym: [L. aculeolus little needle.] (Bot.) Defn: Having small prickles or sharp points. Gray.


ACULEOUS A*cule*ous, a. Defn: Aculeate. [Obs.] Sir T. Browne.


ACULEUS A*cule*us, n.; pl. Aculei. Etym: [L., dim. of acus needle.] 1. (Bot.) Defn: A prickle growing on the bark, as in some brambles and roses. Lindley. 2. (Zo?l.) Defn: A sting.


ACUMEN A*cumen, n. Etym: [L. acumen, fr. acuere to sharpen. Cf. Acute.] Defn: Quickness of perception or discernment; penetration of mind; the faculty of nice discrimination. Selden. Syn. -- Sharpness; sagacity; keenness; shrewdness; acuteness.


ACUMINATE A*cumi*nate, a. Etym: [L. acuminatus, p. p. of acuminare to sharpen, fr. acumen. See Acumen.] Defn: Tapering to a point; pointed; as, acuminate leaves, teeth, etc.


ACUMINATE A*cumi*nate, v. t. Defn: To render sharp or keen. [R.] To acuminate even despair. Cowper.


ACUMINATE A*cumi*nate, v. i. Defn: To end in, or come to, a sharp point. Acuminating in a cone of prelacy. Milton.


ACUMINATION A*cu`mi*nation, n. Defn: A sharpening; termination in a sharp point; a tapering point. Bp. Pearson.


ACUMINOSE A*cumi*nose`, a. Defn: Terminating in a flat, narrow end. Lindley.


ACUMINOUS A*cumi*nous, a. Defn: Characterized by acumen; keen. Highmore.


ACUPRESSURE Ac`u*pressure, n. Etym: [L. acus needle + premere, pressum, to press.] (Surg.) Defn: A mode of arresting hemorrhage resulting from wounds or surgical operations, by passing under the divided vessel a needle, the ends of which are left exposed externally on the cutaneous surface. Simpson.


ACUPUNCTURATION Ac`u*punc`tu*ration, n. Defn: See Acupuncture.


ACUPUNCTURE Ac`u*puncture, n. Etym: [L. acus needle + punctura a pricking, fr. pungere to prick: cf. F. acuponcture.] Defn: Pricking with a needle; a needle prick. Specifically (Med.): Defn: The insertion of needles into the living tissues for remedial purposes.


ACUPUNCTURE Ac`u*puncture, v. t. Defn: To treat with acupuncture.


ACUSTUMAUNCE A*custum*aunce, n. Defn: See Accustomance. [Obs.]


ACUTANGULAR A*cutan`gu*lar, a. Defn: Acute-angled.


ACUTE A*cute, a. Etym: [L. acutus, p. p. of acuere to sharpen, fr. a root ak to be sharp. Cf. Ague, Cute, Edge.] 1. Sharp at the end; ending in a sharp point; pointed; -- opposed to blunt or obtuse; as, an acute angle; an acute leaf. 2. Having nice discernment; perceiving or using minute distinctions; penetrating; clever; shrewd; -- opposed to Ant: dull or Ant: stupid; as, an acute observer; acute remarks, or reasoning. 3. Having nice or quick sensibility; susceptible to slight impressions; acting keenly on the senses; sharp; keen; intense; as, a man of acute eyesight, hearing, or feeling; acute pain or pleasure. 4. High, or shrill, in respect to some other sound; -- opposed to grave or low; as, an acute tone or accent. 5. (Med.) Defn: Attended with symptoms of some degree of severity, and coming speedily to a crisis; -- opposed to chronic; as, an acute disease. Acute angle (Geom.), an angle less than a right angle. Syn. -- Subtile; ingenious; sharp; keen; penetrating; sagacious; sharp- witted; shrewd; discerning; discriminating. See Subtile.


ACUTE A*cute, v. t. Defn: To give an acute sound to; as, he acutes his rising inflection too much. [R.] Walker.


ACUTE-ANGLED A*cute-*an`gled, a. Defn: Having acute angles; as, an acute-angled triangle, a triangle with every one of its angles less than a right angle.


ACUTELY A*cutely, adv. Defn: In an acute manner; sharply; keenly; with nice discrimination.


ACUTENESS A*cuteness, n. 1. The quality of being acute or pointed; sharpness; as, the acuteness of an angle. 2. The faculty of nice discernment or perception; acumen; keenness; sharpness; sensitiveness; -- applied to the senses, or the understanding. By acuteness of feeling, we perceive small objects or slight impressions: by acuteness of intellect, we discern nice distinctions. Perhaps, also, he felt his professional acuteness interested in bringing it to a successful close. Sir W. Scott. 3. Shrillness; high pitch; -- said of sounds. 4. (Med.) Defn: Violence of a disease, which brings it speedily to a crisis. Syn. -- Penetration; sagacity; keenness; ingenuity; shrewdness; subtlety; sharp-wittedness.

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