• Webster's Revised Unabridged Dictionary
    • n. pl Ptenoglossa (Zoöl) A division of gastropod mollusks having the teeth of the radula arranged in long transverse rows, somewhat like the barbs of a feather.
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Century Dictionary and Cyclopedia
    • ptenoglossa A division or suborder of pectinibranchiate gastropods. whose odontophore has numerous similar acuminate admedian teeth in each transverse row. It comprises the families Ianthinidæ, Scalariidæ, Eulimidæ, and Pyramidellidæ.
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Webster's Revised Unabridged Dictionary
NL., fr. Gr. feathered + tongue