Definition of Filibranchia
: an order of Lamellibranchia that comprises marine bivalve mollusks having two pairs of laminated gills formed of distinct V-shaped filaments with interfilamentary junctions either absent or formed by groups of interlocking cilia and nonvascular and that includes mussels, ark shells, and scallops
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Origin and Etymology of filibranchia
New Latin, from fili- + -branchia
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