Gnathidium
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Gnathidia — Gnathidium Gna*thid i*um, n.; pl. {Gnathidia}. [NL., fr. Gr. gna qos the jaw.] (Zo[ o]l.) The ramus of the lower jaw of a bird as far as it is naked; commonly used in the plural. [1913 Webster] … The Collaborative International Dictionary of English
