Definitions

from The Century Dictionary.

  • noun The typical genus of Planorbinæ.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Zoöl.) Any fresh-water air-breathing mollusk belonging to Planorbis and other allied genera, having shells of a discoidal form.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun zoology Any of the freshwater air-breathing mollusks belonging to Planorbis and allied genera, having shells of a discoidal form.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From the genus name.

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Examples

  • But P. planorbis is characterized by a keel around the periphery of the shell, which the specimens from Karagöl are lacking.

    Archive 2006-08-01 AYDIN 2006

  • Lacking a microscope, we initially thought they were Planorbis planorbis, a species recorded from Turkey before.

    Archive 2006-08-01 AYDIN 2006

  • Of the many varieties, one, the largest, the horn-coloured _planorbis_, emits a purple dye.

    The Naturalist on the Thames 1882

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