‖n. [ NL., from Gr. 'a priv. + &unr_; skull. ] 1. (Physiol.) Partial or total absence of the skull. [ 1913 Webster ]

2. pl. (Zool.) The lowest group of Vertebrata, including the amphioxus, in which no skull exists. [ 1913 Webster ]

a. Wanting a skull. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. 'a priv. + &unr_; border. ] (Zool.) A group of acalephs, including most of the larger jellyfishes; the Discophora. [ 1913 Webster ]

{ ‖ n. [ Gr. akrasia. ] Excess; intemperance. [ Obs. except in Med. ] Farindon. [ 1913 Webster ]

{ } v. t. [ Pref. a- + crase; or cf. F. écraser to crush. See Crase, Craze. ] [ 1913 Webster ]

1. To craze. [ Obs. ] Grafton. [ 1913 Webster ]

2. To impair; to destroy. [ Obs. ] Hacket. [ 1913 Webster ]

n. [ OE. aker, AS. æcer; akin to OS. accar, OHG. achar, Ger. acker, Icel. akr, Sw. åker, Dan. ager, Goth. akrs, L. ager, Gr. &unr_;, Skr. ajra. √2, 206. ] 1. Any field of arable or pasture land. [ Obs. ] [ 1913 Webster ]

2. A piece of land, containing 160 square rods, or 4, 840 square yards, or 43, 560 square feet. This is the English statute acre. That of the United States is the same. The Scotch acre was about 1.26 of the English, and the Irish 1.62 of the English. [ 1913 Webster ]

☞ The acre was limited to its present definite quantity by statutes of Edward I., Edward III., and Henry VIII. [ 1913 Webster ]

Broad acres, many acres, much landed estate. [ Rhetorical ] --
God's acre, God's field; the churchyard. [ 1913 Webster ]

I like that ancient Saxon phrase, which calls
The burial ground, God's acre. Longfellow. [ 1913 Webster ]

a. Of an acre; per acre; as, the acreable produce. [ 1913 Webster ]

n. Acres collectively; as, the acreage of a farm or a country. [ 1913 Webster ]

a. Possessing acres or landed property; -- used in composition; as, large-acred men. [ 1913 Webster ]

a. [ L. acer sharp; prob. assimilated in form to acid. See Eager. ] 1. Sharp and harsh, or bitter and not, to the taste; pungent; as, acrid salts. [ 1913 Webster ]

2. Causing heat and irritation; corrosive; as, acrid secretions. [ 1913 Webster ]

3. Caustic; bitter; bitterly irritating; as, acrid temper, mind, writing. [ 1913 Webster ]

Acrid poison, a poison which irritates, corrodes, or burns the parts to which it is applied. [ 1913 Webster ]