extrabranchial

adj, noun — 2 senses

adj

Etymology From extra- + branchial.

Anatomy, Medicine, Sciences Outside of the branchial arches.

noun

Etymology From extra- + branchial.

Cartilage outside of the branchial arches.

Outside of the deep internal visceral arches are the extravisceral cartilages. These may be divided into the labials of the mandibular arch, the extrahyals of the hyoid, and the extrabranchials of the branchial arches.1928, D. J. Frank, The elasmobranch fishes, page 67:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.