Webster's Dictionary, 1913

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Acervuline adjective Resembling little heaps.

Acescence, Acescency noun [ Confer French acescence . See Acescent .] The quality of being acescent; the process of acetous fermentation; a moderate degree of sourness. Johnson.

Acescent adjective [ Latin acescens , -entis , present participle of acescere to turn sour; inchoative of acere to be sour: confer French acescent . See Acid .] Turning sour; readily becoming tart or acid; slightly sour. Faraday.

Acescent noun A substance liable to become sour.

Acetable noun An acetabulum; or about one eighth of a pint. [ Obsolete] Holland.

Acetabular adjective Cup-shaped; saucer-shaped; acetabuliform.

Acetabulifera noun plural [ New Latin See Acetabuliferous .] (Zoology) The division of Cephalopoda in which the arms are furnished with cup-shaped suckers, as the cuttlefishes, squids, and octopus; the Dibranchiata. See Cephalopoda .

Acetabuliferous adjective [ Latin acetablum a little cup + -ferous .] Furnished with fleshy cups for adhering to bodies, as cuttlefish, etc.

Acetabuliform adjective [ Latin acetabulum + -form .] (Botany) Shaped like a shallow cup; saucer-shaped; as, an acetabuliform calyx. Gray.

Acetabulum noun [ Latin , a little saucer for vinegar, from acetum vinegar, from acere to be sour.]
1. (Rom. Antiq.) A vinegar cup; socket of the hip bone; a measure of about one eighth of a pint, etc.

2. (Anat.) (a) The bony cup which receives the head of the thigh bone. (b) The cavity in which the leg of an insect is inserted at its articulation with the body. (c) A sucker of the sepia or cuttlefish and related animals. (d) The large posterior sucker of the leeches. (e) One of the lobes of the placenta in ruminating animals.

Acetal noun [ Acet ic + al cohol.] (Chemistry) A limpid, colorless, inflammable liquid from the slow oxidation of alcohol under the influence of platinum black.

Acetaldehyde noun Acetic aldehyde. See Aldehyde .

Acetamide noun [ Acet yl + amide .] (Chemistry) A white crystalline solid, from ammonia by replacement of an equivalent of hydrogen by acetyl.

Acetanilide noun [ Acet yl + anilide .] (Medicine) A compound of aniline with acetyl, used to allay fever or pain; -- called also antifebrine .

Acetarious adjective [ Latin acetaria , noun plural, salad, from acetum vinegar, from acere to be sour.] Used in salads; as, acetarious plants.

Acetary noun [ Latin acetaria salad plants.] An acid pulp in certain fruits, as the pear. Grew.

Acetate noun [ Latin acetum vinegar, from acere to be sour.] (Chemistry) A salt formed by the union of acetic acid with a base or positive radical; as, acetate of lead, acetate of potash.

Acetated adjective Combined with acetic acid.

Acetic (#; 277) adjective [ Latin acetum vinegar, from acere to be sour.] (Chemistry) (a) Of a pertaining to vinegar; producing vinegar; producing vinegar; as, acetic fermentation. (b) Pertaining to, containing, or derived from, acetyl, as acetic ether, acetic acid. The latter is the acid to which the sour taste of vinegar is due.

Acetification noun The act of making acetous or sour; the process of converting, or of becoming converted, into vinegar.

Acetifier noun An apparatus for hastening acetification. Knight.

Acetify transitive verb [ imperfect & past participle Acetified ; present participle & verbal noun Acetifying ] [ Latin acetum vinegar + -fly .] To convert into acid or vinegar.

Acetify intransitive verb To turn acid. Encyc. Dom. Econ.

Acetimeter noun [ Latin acetum vinegar + -meter : confer French acétimètre .] An instrument for estimating the amount of acetic acid in vinegar or in any liquid containing acetic acid.

Acetimetry noun The act or method of ascertaining the strength of vinegar, or the proportion of acetic acid contained in it. Ure.

Acetin noun (Chemistry) A combination of acetic acid with glycerin. Brande & C.

Acetize intransitive verb To acetify. [ R.]

Acetol noun [ Acet ic + - ol as in alcohol .] (Chemistry) Methyl ketol; also, any of various homologues of the same.

Acetometer noun Same as Acetimeter . Brande & C.

Acetone noun [ See Acetic .] (Chemistry) A volatile liquid consisting of three parts of carbon, six of hydrogen, and one of oxygen; pyroacetic spirit, -- obtained by the distillation of certain acetates, or by the destructive distillation of citric acid, starch, sugar, or gum, with quicklime.

» The term in also applied to a number of bodies of similar constitution, more frequently called ketones . See Ketone .

Acetonic adjective Of or pertaining to acetone; as, acetonic bodies.

Acetonuria noun [ New Latin See Acetone ; Urine .] (Medicine) Excess of acetone in the urine, as in starvation or diabetes.

Acetonæmia, -nemia noun [ New Latin See Acetone ; Hæma- .] (Medicine) A morbid condition characterized by the presence of acetone in the blood, as in diabetes.

Acetophenone noun [ Acet ic + phen yl + one .] (Chemistry) A crystalline ketone, CH 3 COC 6 H 5 , which may be obtained by the dry distillation of a mixture of the calcium salts of acetic and benzoic acids. It is used as a hypnotic under the name of hypnone .

Acetose adjective Sour like vinegar; acetous.

Acetosity noun [ Late Latin acetositas . See Acetous .] The quality of being acetous; sourness.

Acetous (#; 277) adjective [ Latin acetum vinegar, from acere to be sour.]
1. Having a sour taste; sour; acid. "An acetous spirit." Boyle. "A liquid of an acetous kind." Bp. Lowth.

2. Causing, or connected with, acetification; as, acetous fermentation.

Acetous acid , a name formerly given to vinegar.

Acetyl noun [ Latin acetum vinegar + Greek ... substance. See -yl .] (Chemistry) A complex, hypothetical radical, composed of two parts of carbon to three of hydrogen and one of oxygen. Its hydroxide is acetic acid.

Acetylene noun (Chemistry) A gaseous compound of carbon and hydrogen, in the proportion of two atoms of the former to two of the latter. It is a colorless gas, with a peculiar, unpleasant odor, and is produced for use as an illuminating gas in a number of ways, but chiefly by the action of water on calcium carbide. Its light is very brilliant. Watts.

Ach, Ache noun [ French ache , Latin apium parsley.] A name given to several species of plants; as, smallage, wild celery, parsley. [ Obsolete] Holland.

Acharnement noun [ French] Savage fierceness; ferocity.

Achate noun An agate. [ Obsolete] Evelyn.

Achate noun [ French achat purchase. See Cates .]
1. Purchase; bargaining. [ Obsolete] Chaucer.

2. plural Provisions. Same as Cates . [ Obsolete] Spenser.

Achatina noun [ New Latin , from Greek ... agate.] (Zoology) A genus of land snails, often large, common in the warm parts of America and Africa.

Achatour noun [ See Cater .] Purveyor; acater. [ Obsolete] Chaucer.

Ache noun [ Middle English ache , Anglo-Saxon æce , ece , from acan to ache. See Ache , intransitive verb ] Continued pain, as distinguished from sudden twinges, or spasmodic pain. "Such an ache in my bones." Shak.

» Often used in composition, as, a head ache , an ear ache , a tooth ache .

Ache intransitive verb [ imperfect & past participle Ached ; present participle & verbal noun Aching ] [ Middle English aken , Anglo-Saxon acan , both strong verbs, Anglo-Saxon acan , imperfect ōc , past participle acen , to ache; perhaps orig. to drive, and akin to agent .] To suffer pain; to have, or be in, pain, or in continued pain; to be distressed. "My old bones ache ." Shak.

The sins that in your conscience ache .

Achean adjective & noun See Achæan , Achaian .

Achene, Achenium noun [ Greek 'a priv. + ... to gape.] (Botany) A small, dry, indehiscent fruit, containing a single seed, as in the buttercup; -- called a naked seed by the earlier botanists. [ Written also akene and achænium .]

Achæan, Achaian adjective [ Latin Achaeus , Achaius ; Greek ....] Of or pertaining to Achaia in Greece; also, Grecian. -- noun A native of Achaia; a Greek.