Definitions for "Branchia"
A gill; a respiratory organ for breathing the air contained in water, such as many aquatic and semiaquatic animals have.
Greek = gills, adjective - branchial.
coxal gill; a saclike, platelike, foliate, or dendritic respiratory organ attached to the posterior inner face of the coxal segment of peraeopods 2-7.  Sternal gill arises directly from midventral body surface of peraeon segments