Akademik

one of the bony or cartilaginous arches on each side of the pharynx that support the gills of fishes and aquatic amphibians

: one of the bony or cartilaginous arches or curved bars extending dorsoventrally and placed one behind the other posterior to the hyoid arch on each side of the pharynx and supporting the gills of fishes and amphibians; also : a corresponding rudimentary ridge in the embryo of all higher vertebrates

1. Zool. one of a series of bony or cartilaginous arches on each side of the pharynx that support the gills of fishes and aquatic amphibians; gill bar.

2. Embryol. one of a series of archlike mesodermal thickenings of the body wall in the pharyngeal region of the embryo of amphibians, reptiles, birds, and mammals. Also called gill arch, visceral arch.

[1870-75]