Source : Webster's Revised Unabridged Dictionary (1913)

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 : WordNet®

anomia
     n 1: inability to name objects or to recognize written or spoken
          names of objects [syn: {nominal aphasia}, {anomic
          aphasia}, {amnesic aphasia}, {amnestic aphasia}]
     2: type genus of the family Anomiidae: saddle oysters [syn: {genus
        Anomia}]