Physa definitions

Physa

1) Any member of the genus physa 2) Gastropod 3) Univalve
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Physa is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and detritus. == Anatomy == Members of the freshwater pulmonate family Physidae possess a complex of muscles that is unique amongst gastropods. This complex was given the...
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Physa

• (n.) A genus of fresh-water Pulmonifera, having reversed spiral shells. See Pond snail, under Pond.
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Physa

(from the article `gastropod`) Freshwater pulmonates use ciliary action on a bed of mucus secreted by the snail. Many snails, especially Physa, can form a cord of mucus from the ...
Found on http://www.britannica.com/eb/a-z/p/62

Physa

Phy'sa noun [ New Latin , from Greek ... a bellows.] (Zoology) A genus of fresh-water Pulmonifera, having reversed spiral shells. See Pond snail , under Pond .
Found on http://www.encyclo.co.uk/webster/P/80

Physa

Type: Term Pronunciation: fī′să Definitions: 1. Type genus of the freshwater pulmonate snails (family Physidae), which includes several common American species such as Physa parkeri, Physa gyrina, and Physa integra; they are intermediate hosts of a number of bird and animal trematodes, including several that cause schistosome dermat...
Found on http://www.medilexicon.com/medicaldictionary.php?t=68756