/ Dictionary / Index B branchiostegal: Meaning and Definition of Find definitions for: bran•chi•os•te•gal Pronunciation: (brang"kē-os'ti-gul), [key] — Ichthyol. Ichthyol. —n. Also calledone of the long, curved bones just below the operculum, supporting the gill membranes. —adj. of or pertaining to the branchiostegals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. branchiopod branchiostegous Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language