资料来源 : Webster's Revised Unabridged Dictionary (1913)

Gnathastegite \Gna*thas"te*gite\, n. [Gr. ? the jaw + ? a roof.]
   (Zo["o]l.)
   One of a pair of broad plates, developed from the outer
   maxillipeds of crabs, and forming a cover for the other mouth
   organs.