Toxoglossa

from The Collaborative International Dictionary of English v.0.48

Toxoglossa \Tox`o*glos"sa\, n. pl. [NL., fr. Gr. to`xon a bow +
   ? tongue.] (Zool.)
   A division of marine gastropod mollusks in which the radula
   are converted into poison fangs. The cone shells ({Conus}),
   Pleurotoma, and Terebra, are examples. See Illust. of {Cone},
   n., 4, {Pleurotoma}, and {Terebra}.
   [1913 Webster]