Webster’s Revised Unabridged Dictionary · 1913
Radula
Rad′u·la (răd′ū·lȧ), n.; pl. Radulæ (- lē). [L., a scraper, fr. radere to scrape.] (Zoöl.) The chitinous ribbon bearing the teeth of mollusks; — called also lingual ribbon, and tongue. See Odontophore.