rad·u·la 
(răj-lə)
(răj-lə)n. pl. rad·u·lae (-lē′)
A flexible tonguelike organ found in most mollusks, having rows of horny teeth on the surface and used in feeding for scraping or cutting.
[Latin rādula, scraper, from rādere, to scrape; see rēd- in the Appendix of Indo-European roots.]
radu·lar adj.
radulasnail radula