/ Dictionary / Index P perborax: Meaning and Definition of Find definitions for: per•bo•rax Pronunciation: (pur-bôr'uks, -aks, -bōr'-), [key] — n. Chem. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. perborate perboric acid Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language