B. Jonson.
Ac¶ne (#), n. [NL., prob. a corruption of Gr. ?] (Med.) A pustular affection of the skin, due to changes in the sebaceous glands.
AcÏno¶dal (#), a. Pertaining to acnodes.
Ac¶node (#), n. [L. acus needle + E. node.] (Geom.) An isolated point not upon a curve, but whose co”rdinates satisfy the equation of the curve so that it is considered as belonging to the curve.
AÏcock¶ (#), adv. [Pref. aÏ + cock.] In a cocked or turned up fashion.
AÏcock¶bill· (#), adv. [Prefix aÏ + cock + bill: with bills cocked up.] (Naut.) (a) Hanging at the cathead, ready to let go, as an anchor. (b) Topped up; having one yardarm higher than the other.
AÏcold¶ (#), a. [Prob. p. p. of OE. acolen to grow cold or cool, AS. ¾c?lian to grow cold; pref. aÏ (cf. Goth. erÏ, orig. meaning out) + c?lian to cool. See Cool.] Cold. [Obs.] ½Poor Tom's acold.¸
Shak.
Ac·oÏlog¶ic (#), a. Pertaining to acology.
AÏcol¶oÏgy (#), n. [Gr. ? remedy + Ïlogy.] Materia medica; the science of remedies.
AÏcol¶oÏthist (#), n. See Acolythist.
Ac·oÏlyc¶tine (#), n. [From the name of the plant.] (Chem.) An organic base, in the form of a white powder, obtained from Aconitum lycoctonum.
Eng. Cyc.
Ac·oÏlyte (#), n. [LL. acolythus, acoluthus, Gr. ? following, attending: cf. F. acolyte.]
1. (Eccl.) One who has received the highest of the four minor orders in the Catholic church, being ordained to carry the wine and water and the lights at the Mass.
2. One who attends; an assistant. ½With such chiefs, and with James and John as acolytes.¸
Motley.
Ac¶oÏlyth (#), n. Same as Acolyte.
AÏcol¶yÏthist (#), n. An acolyte. [Obs.]
AÏcond¶dyÏlose· (#), AÏcon¶dyÏlous (#), } a. [Gr. ? priv. + ? joint.] (Nat. Hist.) Being without joints; jointless.
Ac·oÏni¶tal (#), a. Of the nature of aconite.
Ac¶oÏnite (#), n. [L. aconitum, Gr. ?: cf. F. aconit.] 1. (Bot.) The herb wolfsbane, or monkshood; Ð applied to any plant of the genus Aconitum (tribe Hellebore), all the species of which are poisonous.
2. An extract or tincture obtained from Aconitum napellus, used as a poison and medicinally.
Winter aconite, a plant (Eranthis hyemalis) allied to the aconites.
Ø Ac·oÏni¶tiÏa (#), n. (Chem.) Same as Aconitine.
Ac·oÏnit¶ic (#), a. Of or pertaining to aconite.
AÏcon¶iÏtine (#), n. (Chem.) An intensely poisonous alkaloid, extracted from aconite.
Ø Ac·oÏni¶tum (#), n. [L. See Aconite.] The poisonous herb aconite; also, an extract from it.
Strong
As aconitum or rash gunpowder.
Shak.
Ø AÏcon¶tiÏa (#), n. pl. [NL., from Gr. ? a little dart.] (Zo”l.) Threadlike defensive organs, composed largely of nettling cells (cnid‘), thrown out of the mouth or special pores of certain Actini‘ when irritated.
Ø AÏcon¶tiÏas (#), n. [NL., from Gr. ?, fr. ?, dim. ? dart.] (Zo”l.) Anciently, a snake, called dart snake; now, one of a genus of reptiles closely allied to the lizards.
AÏcop¶ic (#), a. [Gr. ? priv. + ? striking. weariness, ? to strike.] (Med.) Relieving weariness; restorative.
Buchanan.
A¶corn (#), n. [AS. ‘cern, fr. ‘cer field, acre; akin to D. aker acorn, Ger. ecker, Icel. akarn, Dan. agern, Goth. akran fruit, akrs field; Ð orig. fruit of the field. See Acre.] 1. The fruit of the oak, being an oval nut growing in a woody cup or cupule.
2. (Naut.) A coneÐshaped piece of wood on the point of the spindle above the vane, on the mastÐhead.
3. (Zo”l.) See AcornÐshell.
A¶corn cup (#). The involucre or cup in which the acorn is fixed.
A¶corned (#), a. 1. Furnished or loaded with acorns.
2. Fed or filled with acorns. [R.]
Shak.
A¶cornÐshell· (#), n. (Zo”l.) One of the sessile cirripeds; a barnacle of the genus Balanus. See Barnacle.
AÏcos¶mism (#), n. [Gr. ? priv. + ? world.] A denial of the existence of the universe as distinct from God.
AÏcos¶mist (#), n. [See Acosmism.] One who denies the existence of the universe, or of a universe as distinct from God.
G. H. Lewes.
AÏcot·yÏle¶don (#; 277), n. [Gr. ? priv. + ? anything cupÐshaped. See Cotyledon.] (Bot.) A plant which has no cotyledons, as the dodder and all flowerless plants.
AÏcot·yÏled¶onÏous (#; 277), a. Having no seed lobes, as the dodder; also applied to plants which have no true seeds, as ferns, mosses, etc.
AÏcou¶chy (#), n. [F. acouchi, from the native name Guiana.] (Zo”l.) A small species of agouti (Dasyprocta acouchy).
AÏcou¶meÏter (#), n. [Gr. ? to hear + Ïmeter.] (Physics.) An instrument for measuring the acuteness of the sense of hearing.
Itard.
AÏcou¶meÏtry (#), n. [Gr. ? to hear + Ïmetry.] The measuring of the power or extent of hearing.
AÏcous¶tic (#; 277), a. [F. acoustique, Gr. ? relating to hearing, fr. ? to hear.] Pertaining to the sense of hearing, the organs of hearing, or the science of sounds; auditory.
Acoustic duct, the auditory duct, or external passage of the ear. Ð Acoustic telegraph, a telegraph making audible signals; a telephone. Ð Acoustic vessels, brazen tubes or vessels, shaped like a bell, used in ancient theaters to propel the voices of the actors, so as to render them audible to a great distance.
AÏcous¶tic, n. A medicine or agent to assist hearing.
AÏcous¶ticÏal (#), a. Of or pertaining to acoustics.
AÏcous¶ticÏalÏly (#), adv. In relation to sound or to hearing.
Tyndall.
Ac·ousÏti¶cian (#), n. One versed in acoustics.
Tyndall.
AÏcous¶tics (#; 277), n. [Names of sciences in Ïics, as, acoustics, mathematics, etc., are usually treated as singular. See Ïics.] (Physics.) The science of sounds, teaching their nature, phenomena, and laws.
Acoustics, then, or the science of sound, is a very considerable branch of physics.
Sir J. Herschel.
µ The science is, by some writers, divided, into diacoustics, which explains the properties of sounds coming directly from the ear; and catacoustica, which treats of reflected sounds or echoes.
AcÏquaint¶ (#), a. [OF. acoint. See Acquaint, v. t.] Acquainted. [Obs. or Archaic]
AcÏquaint¶, v. t. [imp. & p. p. Acquainted; p. pr. & vb. n. Acquainting.] [OE. aqueinten, acointen, OF. acointier, LL. adcognitare, fr. L. ad + cognitus, p. p. of cognoscere to know; conÏ + noscere to know. See Quaint, Know.] 1. To furnish or give experimental knowledge of; to make (one) to know; to make familiar; Ð followed by with.
Before a man can speak on any subject, it is necessary to be acquainted with it.
Locke.
A man of sorrows and acquainted with grief.
Isa. liii. 3.
2. To communicate notice to; to inform; to make cognizant; Ð followed by with (formerly, also, by of), or by that, introducing the intelligence; as, to acquaint a friend with the particulars of an act.
Acquaint her here of my son Paris'