Source : Webster's Revised Unabridged Dictionary (1913)

Neomenoidea \Ne`o*me*noi"de*a\, n. pl. [NL., fr. Neomenia, a
   representative genus (See {Neomenia}) + -oid.] (Zo["o]l.)
   A division of vermiform gastropod mollusks, without a shell,
   belonging to the Isopleura.