1. Sourness of taste, with bitterness and astringency, like that of unripe fruit.

2. Harshness, bitterness, or severity; as, acerbity of temper, of language, of pain. Barrow.

ACERIC
A*cer"ic, a. Etym: [L. acer maple.]

Defn: Pertaining to, or obtained from, the maple; as, aceric acid.
Ure.

ACEROSE Ac"er*ose`, a. Etym: [(a) L. acerosus chaffy, fr. acus, gen. aceris, chaff; (b) as if fr. L. acus needle: cf. F. acéreux.] (Bot.) (a) Having the nature of chaff; chaffy. (b) Needle-shaped, having a sharp, rigid point, as the leaf of the pine.

ACEROUS
Ac"er*ous, a.

Defn: Same as Acerose.

ACEROUS Ac"er*ous, a. Etym: [Gr. &a; priv. + keras a horn.] (Zoöl.) (a) Destitute of tentacles, as certain mollusks. (b) Without antennæ, as some insects.

ACERVAL
A*cer"val, a. Etym: [L. acervalis, fr. acervus heap.]

Defn: Pertaining to a heap. [Obs.]