from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A flexible tonguelike organ in certain mollusks, having rows of horny teeth on the surface.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The rasping tongue of snails and most other mollusks.

from the GNU version of the Collaborative International Dictionary of English

  • n. The chitinous ribbon bearing the teeth of mollusks; -- called also lingual ribbon, and tongue. See odontophore.

from The Century Dictionary and Cyclopedia

  • n. In conchology, the tongue or lingual ribbon of a mollusk, specifically called odontophore, and more particularly, the rasping surface or set of teeth of the odontophore, which bites like a file.


Latin rādula, scraper, from rādere, to scrape.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin rādula ("scraper"). (Wiktionary)


  • All gastropods feed by using a radula, which is a tongue-like structure covered by rows of rasping teeth.

    Slugs and Snails

  • Snails and slugs do have teeth on an organ called radula that are sharp enough to cut thru plant tissue.

    Malacologist's sink

  • After tearing apart food with a chitinous tongue called the radula, their food travels down the gullet.

    CreationWiki - Recent changes [en]

  • After tearing apart foot with a chitinous tongue called the radula, their food travels down the gullet.

    CreationWiki - Recent changes [en]

  • Some of the tracks were very clear: one could see the marks the teeth on the radula left as the slug was scraping off its food, cyanobacteria growing on the bark.

    Archive 2009-01-01

  • This one reveals the marks of the individual teeth of the radula that does the scraping.

    Grazing slugs and the evidence they leave behind

  • I would be intriguing to see where they concentrate on feeding, if they have any hidey-holes higher in the tree, if there is a difference in slug body size as related to radula scrape size in height along the tree, etc.

    A slug tree fell in the woods. Did it make a sound?

  • There are isolated groves of the rare endemic Kamchatkan fir Abies gracilis, also Sakhalin fir Abies sachalinensis, unusual thermally influenced caldera communities and several nationally threatened plants such as Cypripedium macranthon, Carex viridula, Fimbristylis ochotensis, Isoetes asiatica, Poa radula and Rhodiola rosea.

    Volcanoes of Kamchatka, Russian Federation

  • The buccal mass is where the radula resides and the ring-like organ immediately below it and encircling the esophagus may be called the snail's brain, for that's where all the nerves coming from different corners of the snail's body congregate.

    Archive 2008-08-01

  • However, even waterproof inks can be scraped off, for example, by the radula of another snail.

    Still red after all these months


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