(definition) by Webster 1913 Wed Dec 22 1999 at 0:16:13

Hy"po*stome (?), Hy*pos"to*ma (?), n. [NL. hypostoma, fr. Gr. beneath + mouth.] Zool.

The lower lip of trilobites, crustaceans, etc.

 

© Webster 1913.

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