gnathostegite


From The Collaborative International Dictionary of English v.0.48:

Gnathostegite \Gna*thos"te*gite\, n. [Gr. gna`qos the jaw + ? a
   roof.] (Zool.)
   One of a pair of broad plates, developed from the outer
   maxillipeds of crabs, and forming a cover for the other mouth
   organs.
   [1913 Webster]
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