• Definition for "physa"
    • some of the genus Physa of freshwater snails.
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physa definition

  • noun:
    • some of the genus Physa of freshwater snails.
    • A genus of fresh-water Pulmonifera, having reversed spiral shells. See Pond snail, under pond.
    • A large genus of pond-snails or fresh-water gastropods of household Limnæidæ, or made sort of the Physidæ, getting the layer sinistral.
    • [lowercase] A pond-snail regarding the genus Physa.
    • [lowercase; pl. physæ (-sē).] In some anthozoans, as Edwardsia, the reduced end associated with body. It would likely or may possibly not be retractile into the scapus. Compare capitulum, 6, and scapus, 6.
    • any member of the genus Physa
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