Defn: 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
Ac"e*tal, n. Etym: [Acetic + alcohol.] (Chem.)

Defn: A limpid, colorless, inflammable liquid from the slow oxidation of alcohol under the influence of platinum black.

ACETALDEHYDE
Ac`et*al"de*hyde, n.

Defn: Acetic aldehyde. See Aldehyde.

ACETAMIDE
Ac`et*am"ide, n. Etym: [Acetyl + amide.] (Chem.)

Defn: A white crystalline solid, from ammonia by replacement of an equivalent of hydrogen by acetyl.

ACETANILIDE
Ac`et*an"i*lide, n. Etym: [Acetyl + anilide.] (Med.)

Defn: A compound of aniline with acetyl, used to allay fever or pain; — called also antifebrine.