Source : Webster's Revised Unabridged Dictionary (1913)

   3. (Zo["o]l.) A genus of marine gastropods, including many
      species of limpets. The shell has the form of a flattened
      cone. The common European limpet ({Patella vulgata}) is
      largely used for food.

   4. (Bot.) A kind of apothecium in lichens, which is
      orbicular, flat, and sessile, and has a special rim not a
      part of the thallus.

Source : WordNet®

Patella vulgata
     n : marine limpet [syn: {common limpet}]