of or pertaining to gills or to the homologous, embryonic parts in animals without gills.

1795–1805; branchi- + -al1

hyperbranchial, adjective
interbranchial, adjective
prebranchial, adjective
subbranchial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
branchial (ˈbræŋkɪəl)
1.  of or relating to the gills of an aquatic animal, esp a fish
2.  of or relating to homologous structures in higher vertebrates: branchial cyst

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

branchial bran·chi·al (brāng'kē-əl)
Of, relating to, or resembling the gills of a fish, their homologous embryonic structures, or the derivatives of their homologous parts in higher animals.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Four branchial grooves are present: the stomodeum is well-marked, and the bucco-pharyngeal membrane has disappeared.
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