radula
noun
rad·u·la ˈra-jə-lə 
plural radulae ˈra-jə-ˌlē
-ˌlī
also radulas : a horny band or ribbon in mollusks other than bivalves that bears minute chitinous teeth on its dorsal surface and scrapes or tears off food and draws it into the mouth
radular
ˈra-jə-lər
adjective 
Example Sentences
Recent Examples on the Web Their teeth are one of the hardest materials in nature and are attached to a flexible tongue-like structure called a radula. 
Ashley Strickland, CNN, 31 May 2021
Ashley Strickland, CNN, 31 May 2021 Word History
Etymology
adaptation (as translation of German Reibplatte) of Latin rādula "scraper," from rādere "to scrape, scratch, pare away, shave" + -ula, deverbal suffix of adjectives and nouns — more at rase
Note: The term was probably introduced by the Russian zoologist Alexander von Middendorff (Aleksandr Fëdorovič Middendorf, 1815-94), in Beiträge zu einer Malacozoologia rossica, 1. Band (St. Petersburg, 1847), p. 54 passim. The editors of the Oxford English Dictionary, third edition, who were unable to trace the word in Middendorff's work, appear not to have consulted the first volume of the Beiträge. The word does not occur in the second and third parts, published in 1849.
First Known Use
1853, in the meaning defined above
Medical Definition
radula
noun
rad·u·la ˈraj-ə-lə
plural radulae -ˌlē -ˌlī also radulas
-ˌlī also radulas : a horny band or ribbon in mollusks other than bivalves that bears minute teeth on its dorsal surface and tears up food and draws it into the mouth and that in some members of the gastropod genus Conus is used to inflict a poisonous and sometimes fatal bite