1. one of the bony or cartilaginous arches on each side of the pharynx that support the gills of fishes and aquatic amphibians; [syn: gill arch, branchial arch, gill bar]
WordNet (r) 3.0 (2006):
gill arch
n 1: one of the bony or cartilaginous arches on each side of the
pharynx that support the gills of fishes and aquatic
amphibians [syn: gill arch, branchial arch, gill bar]