noun, plural rad·u·lae [raj-oo-lee] /ˈrædʒ ʊˌli/.
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.
Origin of radula
1745–55;Related formsrad·u·lar, adjectivesub·rad·u·lar, adjective
< New Latin rādula, Latin:
scraper, equivalent to rād(ere
) to scrape, rub + -ula -ule
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for radula
Historical Examples of radula
All the mollusca, except the bivalves, are provided with this radula.
This is called the radula, and is used for tearing or rasping the food.
It is a mollusk because it has a mantle, a foot, and a radula.
The radula has 160 rows of teeth with twelve teeth in each row.
Radula with a median tooth and three teeth on each side of it.
British Dictionary definitions for radula
noun plural -lae (-ˌliː)
Derived Formsradular, adjective
a horny tooth-bearing strip on the tongue of molluscs that is used for rasping food
Word Origin for radula
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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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