/ Dictionary / Index B branchial: Meaning and Definition of Find definitions for: bran•chi•al Pronunciation: (brang'kē-ul), [key] — adj. of or pertaining to gills or to the homologous, embryonic parts in animals without gills. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: branchial (Thesaurus) branchia branchial arch Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language