/ Dictionary / Index B borosilicic acid: Meaning and Definition of Find definitions for: bo'ro•si•lic'ic ac'id Pronunciation: (bôr'ō-si-lis'ik, bōr'-, bôr"-, bōr"-), [key] — Chem. Chem. any of several hypothetical acids that form borosilicates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. borosilicate glass borough 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