{ } n. [ OE. ax, axe, AS. eax, æx, acas; akin to D. akse, OS. accus, OHG. acchus, G. axt, Icel. öx, öxi, Sw. yxe, Dan. ökse, Goth. aqizi, Gr. 'axi`nh, L. ascia; not akin to E. acute. ] A tool or instrument of steel, or of iron with a steel edge or blade, for felling trees, chopping and splitting wood, hewing timber, etc. It is wielded by a wooden helve or handle, so fixed in a socket or eye as to be in the same plane with the blade. The broadax, or carpenter's ax, is an ax for hewing timber, made heavier than the chopping ax, and with a broader and thinner blade and a shorter handle. [ 1913 Webster ]

The ancient battle-ax had sometimes a double edge. [ 1913 Webster ]

☞ The word is used adjectively or in combination; as, axhead or ax head; ax helve; ax handle; ax shaft; ax-shaped; axlike. [ 1913 Webster ]

This word was originally spelt with e, axe; and so also was nearly every corresponding word of one syllable: as, flaxe, taxe, waxe, sixe, mixe, pixe, oxe, fluxe, etc. This superfluous e is not dropped; so that, in more than a hundred words ending in x, no one thinks of retaining the e except in axe. Analogy requires its exclusion here. [ 1913 Webster ]

“The spelling ax is better on every ground, of etymology, phonology, and analogy, than axe, which has of late become prevalent.” New English Dict. (Murray). [ 1913 Webster ]

{ etc. } See Ax, Axman. [ 1913 Webster ]

adj. 1. raised under sterile conditions; -- of experimental animals; as, axenic conditions. [ WordNet 1.5 ]

2. pure or completely free of the presence of other organisms; -- used of cultures of microorganisms; as, an axenic culture.
Syn. -- uncontaminated; germ-free. [ WordNet 1.5 ]

n. 1. a vitamin essential for normal vision (C20H30O); it prevents night blindness or inflammation or dryness of the eyes; same as vitamin A. One U.S.P. unit of vitamin A is equivalent to 0.30 micrograms of pure vitamin A alcohol.
Syn. -- vitamin A; vitamin A alcohol; antiophthalmic factor; biosterol; retinol; A. [ WordNet 1.5 +PJC ]