branchial arch

noun

1. Zoology. 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. Embryology. 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.

Word History and Origins

Origin of branchial arch¹

First recorded in 1870–75

Example Sentences

The anterior cornu or free part of the first branchial arch is much the largest of the three structures.

From Project Gutenberg

In no single animal is there any evidence that the foremost arch, the mandibular, is a true branchial arch.

From Project Gutenberg

A more probable view is that it develops from rests derived from the first branchial arch an not from the parotid.

From Project Gutenberg

The hyoid is united with the first branchial arch, but has no attachment to the cranium.

From Project Gutenberg

The first branchial arch is well developed, the hyoid arch but slightly.

From Project Gutenberg