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[raj-oo-luh] /ˈrædʒ ʊ lə/
noun, plural radulae
[raj-oo-lee] /ˈrædʒ ʊˌli/ (Show IPA)
a chitinous band in the mouth of most mollusks, set with numerous, minute, horny teeth and drawn backward and forward over the floor of the mouth in the process of breaking up food.
1745-55; < New Latin rādula, Latin: scraper, equivalent to rād(ere) to scrape, rub + -ula -ule
Related forms
radular, adjective
subradular, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for radula
  • Final familial placement must await the acquisition and study of the radula and soft pans of this new taxon.
British Dictionary definitions for radula


noun (pl) -lae (-ˌliː)
a horny tooth-bearing strip on the tongue of molluscs that is used for rasping food
Derived Forms
radular, adjective
Word Origin
C19: from Late Latin: a scraping iron, from Latin rādere to scrape
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for radula

surgical instrument, 1753, from Latin radula "scraper, scraping iron," from radere "to scrape" (see raze). Related: Radular.

Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Article for radula

horny, ribbonlike structure found in the mouths of all mollusks except the bivalves. The radula, part of the odontophore, may be protruded, and it is used in drilling or in rasping food particles from a surface. It is supported by a cartilage-like mass and is covered with rows of many small teeth (denticles). New sections are constantly produced to replace those worn away at the front.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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