Definition of Prionodesmacea
in some classifications
: a division of Lamellibranchia comprising comparatively primitive bivalve mollusks that typically have the hinge prionodont and being approximately equal to the combined orders Protobranchia and Filibranchia
prionodesmaceannoun or adjective
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Origin and Etymology of prionodesmacea
New Latin, from prion- + desm- + -acea
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