'Hypostome' definitions:
Definition of '
Hypostome
'
From:
GCIDE
Hypostome \Hy"po*stome\, Hypostoma \Hy*pos"to*ma\, n. [NL. hypostoma, fr. Gr. "ypo` beneath + ? mouth.] (Zool.) The lower lip of trilobites, crustaceans, etc. [1913 Webster]
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