Anomia \A*no"mi*a\, n. [NL., fr. Gr. ? irregular; 'a priv. + no'mos law.]

(Zo["o]l.) A genus of bivalve shells, allied to the oyster, so called from their unequal valves, of which the lower is perforated for attachment.

Source: Webster's Revised Unabridged Dictionary (1913)