[ per-bawr-eyt, -bohr- ]
/ pərˈbɔr eɪt, -ˈboʊr- /

noun Chemistry.

a salt of perboric acid, as sodium perborate, NaBO3⋅4H2O, used for bleaching, disinfecting, etc.

Origin of perborate

First recorded in 1880–85; per- + borate Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for perborate

  • The perborate should be added when the powder is perfectly dry or it loses its bleaching properties.

    Soap-Making Manual|E. G. Thomssen

British Dictionary definitions for perborate


/ (pəˈbɔːreɪt) /


any of certain salts derived, or apparently derived, from perboric acid. Perborates are used as bleaches in washing powdersSee sodium perborate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012