Source : Webster's Revised Unabridged Dictionary (1913)

Ptenoglossa \Pte`no*glos"sa\, n. pl. [NL., fr. Gr.? feathered +
   ? tongue.] (Zo["o]l.)
   A division of gastropod mollusks having the teeth of the
   radula arranged in long transverse rows, somewhat like the
   barbs of a feather.