Word Study
zygobranchia
CIDE DICTIONARY
zygobranchia, n. pl. [NL., from Gr. zygo`n a yoke + a gill.].
A division of marine gastropods in which the gills are developed on both sides of the body and the renal organs are also paired. The abalone (Haliotis ) and the keyhole limpet (Fissurella ) are examples. [1913 Webster]
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