Defn: A gaseous compound of carbon and hydrogen, in the proportion of two atoms of the former to two of the latter. It is a colorless gas, with a peculiar, unpleasant odor, and is produced for use as an illuminating gas in a number of ways, but chiefly by the action of water on calcium carbide. Its light is very brilliant. Watts.

ACH; ACHE
Ach, Ache, n. Etym: [F. ache, L. apium parsley.]

Defn: A name given to several species of plants; as, smallage, wild celery, parsley. [Obs.] Holland.

ACHAEAN; ACHAIAN
A*chæ"an, A*cha"ian a. Etym: [L. Achaeus, Achaius; Gr.

Defn: Of or pertaining to Achaia in Greece; also, Grecian.
— n.

Defn: A native of Achaia; a Greek.

ACHARNEMENT
A*char"ne*ment, n. Etym: [F.]

Defn: Savage fierceness; ferocity.

ACHATE
Ach"ate, n.

Defn: An agate. [Obs.] Evelyn.