AÏcerb¶ic (#), a. Sour or severe.

AÏcerb¶iÏtude (#), n. [L. acerbitudo, fr. acerbus.] Sourness and harshness. [Obs.]
Bailey.
AÏcerb¶iÏty (#), n. [F. acerbit‚, L. acerbitas, fr. acerbus. See Acerb.] 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.
AÏcer¶ic (#), a. [L. acer maple.] Pertaining to, or obtained from, the maple; as, aceric acid.
Ure.
Ac¶erÏose· (#), a. [(a) L. acerosus chaffy, fr. acus, gen. aceris, chaff; (b) as if fr. L. acus needle: cf. F. ac‚reux.] (Bot.) (a) Having the nature of chaff; chaffy. (b) NeedleÐshaped, having a sharp, rigid point, as the leaf of the pine.

Ac¶erÏous (#), a. Same as Acerose.

Ac¶erÏous, a. [Gr. <a> priv. + <keras> a horn.] (Zo”l.) (a) Destitute of tentacles, as certain mollusks. (b) Without antenn‘, as some insects.

AÏcer¶val (#), a. [L. acervalis, fr. acervus heap.] Pertaining to a heap. [Obs.]

AÏcer¶vate (#), v. t. [L. acervatus, p. p. of acervare to heap up, fr. acervus heap.] To heap up. [Obs.]
AÏcer¶vate (#), a. Heaped, or growing in heaps, or closely compacted clusters.

Ac·erÏva¶tion (#), n. [L. acervatio.] A heaping up; accumulation. [R.]
Johnson.
AÏcer¶vaÏtive (#), a. Heaped up; tending to heap up.

AÏcer¶vose (#), a. Full of heaps. [R.]
Bailey.

AÏcer¶vuÏline (#), a. Resembling little heaps.

AÏces¶cence (#), AÏces¶cenÏcy (#), } n. [Cf. F. acescence. See Acescent.] The quality of being acescent; the process of acetous fermentation; a moderate degree of sourness.
Johnson.
AÏces¶cent (#), a. [L. acescens, Ïentis, p. pr. of acescere to turn sour; inchoative of acere to be sour: cf. F. acescent. See Acid.] Turning sour; readily becoming tart or acid; slightly sour.
Faraday.