Meaning of sodium peroxide

so'dium perox'ide

Pronunciation: [key]
— Chem. Chem.
  1. a yellowish-white, hygroscopic, water-soluble powder, NaO, used chiefly as a bleaching agent and as an oxidizing agent.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.