Noun
The chitinous ribbon bearing the teeth of mollusks; -- called also lingual ribbon, and tongue. See Odontophore.
Source: Webster's dictionaryThe mouth contains the radula (the rough tongue common to all molluscs except bivalvia ). Source: Internet
The radula has small median teeth, and the lateral teeth are single and beam-like. Source: Internet
The radula works like a file, ripping food into small pieces. Source: Internet