Why is the mollusks tongue called a radula?

The mollusk's tongue is called a radula because it is a unique feeding organ that functions somewhat like a tongue, but is distinct in structure and purpose. The radula is covered with rows of tiny, chitinous teeth that help scrape, cut, or shred food, allowing mollusks to feed on a variety of materials, such as algae or detritus. This specialized organ is a defining characteristic of most mollusks, distinguishing them from other animal groups. The term "radula" comes from the Latin Word "radere," meaning "to scrape."