| Peroxide (n.) An oxide containing more oxygen than some other oxide of the same element. Formerly peroxides were regarded as the highest oxides. Cf. Per-, 2. Thesaurus Entries achromatize, blanch, bleach, bleaching powder, chlorine, decolor, decolorize, dim, discolor, drain, drain of color, dull, etiolate, fade, fume, hydrochloric acid, hydrogen peroxide, lime, nitrogen tetroxide, oxalic acid, pale, sodium hypochlorite, sour, sulfur dioxide, sulfuric acid, tarnish, tone down, wash out, white sour, whiten |