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n. The act of abacinating. [ R. ] [ 1913 Webster ]

‖n. [ Gr. 'abaki`skos, dim of 'a`bax. See Abacus. ] (Arch.) One of the tiles or squares of a tessellated pavement; an abaculus. [ 1913 Webster ]

n. [ LL abacista, fr. abacus. ] One who uses an abacus in casting accounts; a calculator. [ 1913 Webster ]

a. Relating to the abdomen and the thorax, or chest. [ 1913 Webster ]

a. [ L. abortus (see Abort, v.) + faciens, p. pr. of facere to make. ] Producing miscarriage. -- n. A drug or an agent that causes premature delivery. [ 1913 Webster ]

adj. 1. 1 inducing or promoting absorption
Syn. -- sorbefacient [ WordNet 1.5 ]

n. (Antiq.) A roll or bag, filled with dust, borne by Byzantine emperors, as a memento of mortality. It is represented on medals. [ 1913 Webster ]

n.; pl. E. acacias L. acaciae [ L. from Gr. 'akaki`a; orig. the name of a thorny tree found in Egypt; prob. fr. the root ak to be sharp. See Acute. ] 1. [ capitalized ] A genus of leguminous trees and shrubs. Nearly 300 species are Australian or Polynesian, and have terete or vertically compressed leaf stalks, instead of the bipinnate leaves of the much fewer species of America, Africa, etc. Very few are found in temperate climates. [ 1913 Webster ]

2. (Med.) The inspissated juice of several species of acacia; -- called also gum acacia, and gum arabic. AS [ 1913 Webster ]

n. Gum arabic. [ 1913 Webster ]

‖n.; pl. Aciculæ [ L., a small needle, dimin. of acus needle. ] (Nat. Hist.) One of the needlelike or bristlelike spines or prickles of some animals and plants; also, a needlelike crystal. [ 1913 Webster ]

a. Needle-shaped; slender like a needle or bristle, as some leaves or crystals; also, having sharp points like needles. [ 1913 Webster ]

A*cic"u*lar*ly, adv.. [1913 Webster]

{ a. (Nat. Hist.) (a) Furnished with aciculæ. (b) Acicular. (c) Marked with fine irregular streaks as if scratched by a needle. Lindley. [ 1913 Webster ]

a. [ L. acicula needle + -form. ] Needle-shaped; acicular. [ 1913 Webster ]

n. (Min.) Needle ore. Brande & C. [ 1913 Webster ]

a. [ L. acidus sour, fr. the root ak to be sharp: cf. F. acide. Cf. Acute. ] 1. Sour, sharp, or biting to the taste; tart; having the taste of vinegar: as, acid fruits or liquors. Also fig.: Sour-tempered. [ 1913 Webster ]

He was stern and his face as acid as ever. A. Trollope. [ 1913 Webster ]

2. Of or pertaining to an acid; as, acid reaction. [ 1913 Webster ]

n. 1. A sour substance. [ 1913 Webster ]

2. (Chem.) One of a class of compounds, generally but not always distinguished by their sour taste, solubility in water, and reddening of vegetable blue or violet colors. They are also characterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losing their own peculiar properties. They all contain hydrogen, united with a more negative element or radical, either alone, or more generally with oxygen, and take their names from this negative element or radical. Those which contain no oxygen are sometimes called hydracids in distinction from the others which are called oxygen acids or oxacids. [ 1913 Webster ]

☞ In certain cases, sulphur, selenium, or tellurium may take the place of oxygen, and the corresponding compounds are called respectively sulphur acids or sulphacids, selenium acids, or tellurium acids. When the hydrogen of an acid is replaced by a positive element or radical, a salt is formed, and hence acids are sometimes named as salts of hydrogen; as hydrogen nitrate for nitric acid, hydrogen sulphate for sulphuric acid, etc. In the old chemistry the name acid was applied to the oxides of the negative or nonmetallic elements, now sometimes called anhydrides. [ 1913 Webster ]

adj. 1. yielding an acid in aqueous solution [ WordNet 1.5 ]

a. (Min.) 1. Containing a high percentage of silica; -- opposed to basic. [ 1913 Webster ]

2. of or relating to acid; having the character of an acid, as an acidic solution. [ PJC ]

a. [ L. acidus sour + -ferous. ] Containing or yielding an acid. [ 1913 Webster ]

a. Capable of being acidified, or converted into an acid. [ 1913 Webster ]

a. Producing acidity; converting into an acid. Dana. [ 1913 Webster ]

n. [ Cf. F. acidification. ] The act or process of acidifying, or changing into an acid. [ 1913 Webster ]

n. (Chem.) A simple or compound principle, whose presence is necessary to produce acidity, as oxygen, chlorine, bromine, iodine, etc. [ 1913 Webster ]

v. t. [ imp. & p. p. Acidified p. pr. & vb. n. Acidifying ] [ L. acidus sour, acid + -fy: cf. F. acidifier. ] 1. To make acid; to convert into an acid; as, to acidify sugar. [ 1913 Webster ]

2. To sour; to imbitter. [ 1913 Webster ]

His thin existence all acidified into rage. Carlyle. [ 1913 Webster ]

n. [ L. acidus acid + -meter. ] (Chem.) An instrument for ascertaining the strength of acids. Ure. [ 1913 Webster ]

n. [ L. acidus acid + -metry. ] (Chem.) The measurement of the strength of acids, especially by a chemical process based on the law of chemical combinations, or the fact that, to produce a complete reaction, a certain definite weight of reagent is required. -- Ac`id*i*met"ric*al a. [1913 Webster]

n. [ L. acidites, fr. acidus: cf. F. acidité. See Acid. ] The quality of being sour; sourness; tartness; sharpness to the taste; as, the acidity of lemon juice. [ 1913 Webster ]

adj. 1. thriving in a relatively acid environment; -- especially of plants requiring a pH well below 7 alkaline-loving [ WordNet 1.5 ]

adv. Sourly; tartly. [ 1913 Webster ]

n. Acidity; sourness. [ 1913 Webster ]

adj. 1. 1 growing well in an acid medium; said of some bacteria
Syn. -- aciduric [ WordNet 1.5 ]

n. 1. abnormally high acidity of the blood and other body fluids. [ WordNet 1.5 ]

adj. 1. of or pertaining to acidosis; suffering from acidosis. [ WordNet 1.5 ]

. (Iron Metal.) That variety of either the Bessemer or the open-hearth process in which the converter or hearth is lined with acid, that is, highly siliceous, material. Opposed to basic process. [ Webster 1913 Suppl. ]

v. t. [ imp. & p. p. Acidulated p. pr. & vb. n. Acidulating ] [ Cf. F. aciduler. See Acidulous. ] To make sour or acid in a moderate degree; to sour somewhat. Arbuthnot. [ 1913 Webster ]

adj. 1. made slightly acidic [ WordNet 1.5 ]

a. Having an acid quality; sour; acidulous. “With anxious, acidulent face.” Carlyle. [ 1913 Webster ]

a. [ L. acidulus, dim. of acidus. See Acid. ] Slightly sour; sub-acid; sourish; as, an acidulous tincture. E. Burke. [ 1913 Webster ]

Acidulous mineral waters, such as contain carbonic anhydride. [ 1913 Webster ]

v. 1. to wash (blue jeans) in acid, so as to cause the color to fade. [ WordNet 1.5 ]

n. [ F. aciérage, fr. acier steel. ] The process of coating the surface of a metal plate (as a stereotype plate) with steellike iron by means of voltaic electricity; steeling. [ 1913 Webster ]

a. [ L. acus needle + -form. ] Shaped like a needle. [ 1913 Webster ]

a. [ L. acinus a grape, grapestone. ] (Bot.) Containing seeds or stones of grapes, or grains like them. [ 1913 Webster ]

‖n. [ L., from Gr. &unr_;. ] (Anc. Hist.) A short sword or saber. [ 1913 Webster ]

a. [ L. acinaces a short sword + -form: cf. F. acinaciforme. ] (Bot.) Scimeter-shaped; as, an acinaciform leaf. [ 1913 Webster ]

‖n. (Med.) Same as Akinesia. AS [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. 'akinhtos immovable. ] (Zool.) A group of suctorial Infusoria, which in the adult stage are stationary. See Suctoria. [ 1913 Webster ]

a. [ Acinetæ + -form. ] (Zool.) Resembling the Acinetæ. [ 1913 Webster ]

a. [ L. acinus a grape, grapestone + -form: cf. F. acinoforme. ] 1. Having the form of a cluster of grapes; clustered like grapes. [ 1913 Webster ]

2. Full of small kernels like a grape. [ 1913 Webster ]