n. [ OE. ache, AS. æce, ece, fr. acan to ache. See Ache, v. i. ] Continued pain, as distinguished from sudden twinges, or spasmodic pain. “Such an ache in my bones.” Shak. [ 1913 Webster ]

☞ Often used in composition, as, a headache, an earache, a toothache. [ 1913 Webster ]

v. i. [ imp. & p. p. Ached p. pr. & vb. n. Aching ] [ OE. aken, AS. acan, both strong verbs, AS. acan, imp. ōc, p. p. acen, to ache; perh. orig. to drive, and akin to agent. ] To suffer pain; to have, or be in, pain, or in continued pain; to be distressed. “My old bones ache.” Shak. [ 1913 Webster ]

The sins that in your conscience ache. Keble. [ 1913 Webster ]

{ } n. [ F. ache, L. apium parsley. ] A name given to several species of plants; as, smallage, wild celery, parsley. [ Obs. ] Holland. [ 1913 Webster ]

a & n. See Achæan, Achaian. [ 1913 Webster ]

a. Pertaining to an achene. [ 1913 Webster ]

{ n. [ Gr. 'a priv. + &unr_; to gape. ] (Bot.) A small, dry, indehiscent fruit, containing a single seed, as in the buttercup; -- called a naked seed by the earlier botanists. [ Written also akene and achænium. ] [ 1913 Webster ]

n. [ L., fr. Gr. &unr_;. ] (Myth.) A river in the Nether World or infernal regions; also, the infernal regions themselves. By some of the English poets it was supposed to be a flaming lake or gulf. Shak. [ 1913 Webster ]

n. 1. 1 death's-head moth.
Syn. -- genus Acherontia [ WordNet 1.5 ]

a. Of or pertaining to Acheron; infernal; hence, dismal, gloomy; moribund. [ 1913 Webster ]

n. 1. a genus of Orthopteran insects consisting of common house and field crickets.
Syn. -- genus Acheta [ WordNet 1.5 ]