Dictionary.com
definitions

hypobranchial

[hahy-puh-brang-kee-uh l]
adjective Zoology.
  1. situated below the gills or beneath the branchial arches.

Origin of hypobranchial

First recorded in 1840–50; hypo- + branchial
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for hypobranchial

Historical Examples of hypobranchial