‖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 ]

adv. In an acid manner. [ 1913 Webster ]

{ n. The quality of being acrid or pungent; irritant bitterness; extreme bitterness; acrimony; as, the acridity of a plant, of a speech.
Syn. -- acridness [ 1913 Webster ]

2. having an acrid smell.
Syn. -- pungency [ WordNet 1.5 ]

n. 1. 1 a genus of birds comprising the mynas.
Syn. -- genus Acridotheres. [ WordNet 1.5 ]

n. 1. a strong soft crease-resistant fabric. [ WordNet 1.5 ]

a. [ Cf. LL. acrimonious, F. acrimonieux. ] 1. Acrid; corrosive; as, acrimonious gall. [ Archaic ] Harvey. [ 1913 Webster ]

2. Caustic; bitter-tempered' sarcastic; as, acrimonious dispute, language, temper. [ 1913 Webster ]

adv. In an acrimonious manner. [ 1913 Webster ]

n. The quality of being acrimonious; asperity; acrimony. [ 1913 Webster ]

n.; pl. Acrimonies [ L. acrimonia, fr. acer, sharp: cf. F. acrimonie. ] 1. A quality of bodies which corrodes or destroys others; also, a harsh or biting sharpness; as, the acrimony of the juices of certain plants. [ Archaic ] Bacon. [ 1913 Webster ]

2. Sharpness or severity, as of language or temper; irritating bitterness of disposition or manners. [ 1913 Webster ]

John the Baptist set himself with much acrimony and indignation to baffle this senseless arrogant conceit of theirs. South. [ 1913 Webster ]

Syn. -- Acrimony, Asperity, Harshness, Tartness. These words express different degrees of angry feeling or language. Asperity and harshness arise from angry feelings, connected with a disregard for the feelings of others. Harshness usually denotes needless severity or an undue measure of severity. Acrimony is a biting sharpness produced by an imbittered spirit. Tartness denotes slight asperity and implies some degree of intellectual readiness. Tartness of reply; harshness of accusation; acrimony of invective. [ 1913 Webster ]

In his official letters he expressed, with great acrimony, his contempt for the king's character. Macaulay. [ 1913 Webster ]

It is no very cynical asperity not to confess obligations where no benefit has been received. Johnson. [ 1913 Webster ]

A just reverence of mankind prevents the growth of harshness and brutality. Shaftesbury. [ 1913 Webster ]

{ ‖ } n. [ LL. acrisia, Gr. 'akrisi`a; 'a priv. + kri`nein to separate, to decide. ] 1. Inability to judge. [ 1913 Webster ]

2. (Med.) Undecided character of a disease. [ Obs. ] [ 1913 Webster ]

‖n. pl. [ NL., from Gr. &unr_; indiscernible; 'a priv. + &unr_; to distinguish. ] (Zool.) The lowest groups of animals, in which no nervous system has been observed. [ 1913 Webster ]

a. (Zool.) Of or pertaining to the Acrita. -- n. An individual of the Acrita. [ 1913 Webster ]

a. (Zool.) Acritan. Owen. [ 1913 Webster ]

a. [ Gr. 'a priv. + &unr_; critical. ] (Med.) Having no crisis; giving no indications of a crisis; as, acritical symptoms, an acritical abscess. [ R. ] AS [ 1913 Webster ]

n. [ Gr. &unr_; undistinguishable; 'a priv. + &unr_; to separate, distinguish + &unr_; color. ] Color blindness; achromatopsy. [ 1913 Webster ]

n. [ L. acritudo, from acer sharp. ] Acridity; pungency joined with heat. [ Obs. ] [ 1913 Webster ]

n. [ L. acritas, fr. acer sharp: cf. F. âcreté. ] Sharpness; keenness. [ Obs. ] [ 1913 Webster ]

{ } a. [ Gr. &unr_;, fr. &unr_; to hear. ] Communicated orally; oral; -- applied to the esoteric teachings of Aristotle, those intended for his genuine disciples, in distinction from his exoteric doctrines, which were adapted to outsiders or the public generally. Hence: Abstruse; profound. [ 1913 Webster ]

a. [ Gr. &unr_;, fr. &unr_; to hear. ] Same as Acroamatic. [ 1913 Webster ]

n. [ F. acrobate, fr. Gr. &unr_; walking on tiptoe, climbing aloft; &unr_; high + &unr_; to go. ] One who practices rope dancing, high vaulting, or other daring gymnastic feats. [ 1913 Webster ]

n. 1. 1 a genus of mammals.
Syn. -- genus Acrobates. [ WordNet 1.5 ]

a. [ Cf. F. acrobatique. ] Pertaining to an acrobat. [ 1913 Webster ]

-- Ac`ro*bat"ic*al*ly, adv. [1913 Webster]

n. Feats of the acrobat; daring gymnastic feats; high vaulting. [ 1913 Webster ]

a. [ Gr. &unr_; extreme, highest + &unr_; fruit. ] (Bot.) (a) Having a terminal fructification; having the fruit at the end of the stalk. (b) Having the fruit stalks at the end of a leafy stem, as in certain mosses. [ 1913 Webster ]

adj. 1. having a subterminal centromere an acrocentric chromosome [ WordNet 1.5 ]

a. [ Gr. &unr_; highest + &unr_;. See Cephalic. ] Characterized by a high skull. [ 1913 Webster ]

n. 1. 1 a genus of birds.
Syn. -- genus Acrocephalus. [ WordNet 1.5 ]

n. Loftiness of skull. [ 1913 Webster ]

a. [ L. acroceraunius, fr. Gr. &unr_; high, n. pl. &unr_; heights + &unr_; thunderbolt. ] Of or pertaining to the high mountain range of “thunder-smitten” peaks (now Kimara), between Epirus and Macedonia. Shelley. [ 1913 Webster ]

n. 1. 1 a genus of herbs and shrubs of Australia and Southern Africa, with an everlasting flower; most species are usually placed in genus Helipterum.
Syn. -- genus Acroclinium [ WordNet 1.5 ]

n. 1. 1 a genus of Central and South American feather palms.
Syn. -- genus Acrocomia [ WordNet 1.5 ]

‖n. [ NL., from Gr. &unr_; topmost + &unr_; finger. ] (Zool.) The upper surface of the toes, individually. [ 1913 Webster ]

n. [ Gr. 'a`kros summit + 'odoy`s, 'odo`ntos, a tooth. ] (Zool.) One of a group of lizards having the teeth immovably united to the top of the alveolar ridge. -- a. Of or pertaining to the acrodonts. [ 1913 Webster ]

n. [ Gr. 'a`kros extreme, high + -gen. ] (Bot.) A plant of the highest class of cryptogams, including the ferns, etc. See Cryptogamia. [ 1913 Webster ]

The Age of Acrogens (Geol.), the age of coal plants, or the carboniferous era. [ 1913 Webster ]

adj. 1. 1 pertaining to acrogens, flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem.
Syn. -- acrogenous [ WordNet 1.5 ]

a. (Bot.) Increasing by growth from the extremity; as, an acrogenous plant. [ 1913 Webster ]

n. [ L. acer sharp + olēre to smell. ] (Chem.) A limpid, colorless, highly volatile liquid, obtained by the dehydration of glycerin, or the destructive distillation of neutral fats containing glycerin. Its vapors are intensely irritating. Watts. [ 1913 Webster ]

n. [ L. acrolthus, Gr. 'akroli`qos with the ends made of stone; 'a`kros extreme + li`qos stone. ] (Arch. & Sculp.) A statue whose extremities are of stone, the trunk being generally of wood. Elmes. [ 1913 Webster ]

{ } a. Pertaining to, or like, an acrolith. [ 1913 Webster ]

n. [ NL. acromegalia, fr. Gr. 'a`kron point, peak + me`gas, mega`loy, big. ] (Med.) Chronic enlargement of many bones of the skeleton, especially bones of hands, feet and face; the condition is due to excessive secretion of growth hormone. [ 1913 Webster + AS ]

a. [ Cf. F. acromial. ] (Anat.) Of or pertaining to the acromion. Dunglison. [ 1913 Webster ]