Lym·naea | \ lim-ˈnē-ə, ˈlim-nē-ə 
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\Medical Definition of Lymnaea
: a genus of snails formerly almost coextensive with the family Lymnaeidae but now comprising comparatively few species of dextrally coiled freshwater snails that include some medically important intermediate hosts of flukes — compare fossaria, galba
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