Part 50

Ac"e*tol (?), n. [Acetic + - ol as in alcohol.] (Chem.) Methyl ketol; also, any of various homologues of the same.

||Ac`e*to*næ"mi*a, -ne"mi*a (&?;), n. [NL. See Acetone; Hæma-.] (Med.) A morbid condition characterized by the presence of acetone in the blood, as in diabetes.

||Ac`e*to*nu"ri*a (?), n. [NL. See Acetone; Urine.] (Med.) Excess of acetone in the urine, as in starvation or diabetes.

Ac`e*to*phe"none (?), n. [Acetic + phenyl + one.] (Chem.) A crystalline ketone, CH3COC6H5, 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.

||A` che*val" (?). [F., lit., on horseback.] Astride; with a part on each side; -- used specif. in designating the position of an army with the wings separated by some line of demarcation, as a river or road.

A position à cheval on a river is not one which a general willingly assumes.

Swinton.

A*chro"ma*tous (?), a. [See Ahromatic.] Lacking, or deficient in, color; as, achromatous blood.

A*chro"mic (?), a. [Gr. &?; colorless; &?; priv. + &?; color.] Free from color; colorless; as, in Physiol. Chem., the achromic point of a starch solution acted upon by an amylolytic enzyme is the point at which it fails to give any color with iodine.

Ac"id proc"ess. (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.

Ac`o*nit"ic (?), a. (Chem.) Pert. to or designating a crystalline tribasic acid, &?;, obtained from aconite and other plants. It is a carboxyl derivative of itaconic acid.

Ac*tin"o*gram (?), n. [Gr. &?;, &?;, ray + -gram.] A record made by the actinograph.

||Ac`ti*no*my*co"sis (?), n. [NL.] (Med.) 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*cot"ic (#), a.

Ac*tin"o*phone (?), n. [Gr. &?;, &?;, ray + &?; voice.] (Physics) An apparatus for the production of sound by the action of the actinic, or ultraviolet, rays.

Ac*tin`o*phon"ic (?), a. (Physics) Pertaining to, or causing the production of, sound by means of the actinic, or ultraviolet, rays; as, actinophonic phenomena.

Ac`u*tor"sion (?), n. [L. acus needle + torsion.] (Med.) The twisting of an artery with a needle to arrest hemorrhage.

A*cyc"lic (?), a. [Pref. a- not + cyclic.] Not cyclic; not disposed in cycles or whorls; as: (a) (Bot.) Of a flower, having its parts inserted spirally on the receptacle. (b) (Org. Chem.) Having an open-chain structure; aliphatic.

Ac"yl (?), n. [Acid + - yl.] (Org. Chem.) An acid radical, as acetyl, malonyl, or benzoyl.

Ad*dress", v. t. -- To address the ball (Golf), to take aim at the ball, adjusting the grip on the club, the attitude of the body, etc., to a convenient position.

Ad"e*noid (?), n. (Med.) A swelling produced by overgrowth of the adenoid tissue in the roof of the pharynx; -- usually in pl.

||Ad`e*no"ma (?), n.; L. pl. -mata (#). [NL.; adeno- + -oma.] (Med.) A benign tumor of a glandlike structure; morbid enlargement of a gland. -- Ad`e*nom"a*tous (&?;), a.

Ad"e*nop"a*thy (?), n. [Adeno- + Gr. &?; suffering, &?; to suffer.] (Med.) Disease of a gland.

||Ad"e*no*scle*ro"sis (?), n. [NL.; adeno- + sclerosis.] (Med.) The hardening of a gland.

A"den ul"cer (?). [So named after Aden, a seaport in Southern Arabia, where it occurs.] (Med.) A disease endemic in various parts of tropical Asia, due to a specific microörganism which produces chronic ulcers on the limbs. It is often fatal. Called also Cochin China ulcer, Persian ulcer, tropical ulcer, etc.

||A`dios" (?), interj. [Sp., fr. L. ad to + deus god. Cf. Adieu.] Adieu; farewell; good-by; -- chiefly used among Spanish-speaking people.

This word is often pronounced å*d"s, but the Spanish accent, though weak, is on the final syllable.

Ad`i*pog"e*nous (?), a. [See Adipose; -genous.] (Med.) Producing fat.

||Ad`i*pol"y*sis (?), n. [NL.; L. adeps, adipis, fat + Gr. &?; a loosing.] (Physiol.) The digestion of fats.