'Gnathidia' definitions:

Definition of 'Gnathidia'

From: GCIDE

Gnathidium \Gna*thid"i*um\, n.; pl. Gnathidia. [NL., fr. Gr. gna`qos the jaw.] (Zool.) The ramus of the lower jaw of a bird as far as it is naked; -- commonly used in the plural. [1913 Webster]