a white, odorless, crystalline compound, NaBO·4HO, used chiefly as a bleaching and oxidizing agent and in germicides, deodorants, etc.
See sodium perborate in American Heritage Dictionary 4
noun
A white odorless crystalline compound, NaBO2·H2O2·3H2O, used as a mild alkaline oxidizing agent in dentifrices, as a topical antiseptic and deodorant, and as an industrial reagent.