Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

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

from the GNU version of the Collaborative International Dictionary of English

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

from The Century Dictionary and Cyclopedia

  • n. The typical genus of Planorbinæ.

Etymologies

From the genus name. (Wiktionary)

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

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

    Archive 2006-08-01

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

    The Naturalist on the Thames

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