Definition of Eulamellibranchia
: an order of Lamellibranchia comprising bivalve mollusks that have filamentous gills forming two continuous flattened layers on each side of the body, the foot usually large, and a byssus reduced or absent and that include the oysters, freshwater mussels, clams, cockles, shipworms, and numerous related mollusks
eulamellibranchiate\"+\ adjective or noun
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Origin and Etymology of eulamellibranchia
New Latin, from eu- + Lamellibranchia
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