[per.ox.ide] n [ISV] (1804): an oxide containing a high proportion of oxygen; esp: a compound (as hydrogen peroxide) in which oxygen is visualized as joined to oxygen -- per.ox.id.ic adj
[2]peroxide vt -id.ed ; -id.ing (1906): to treat with a peroxide; esp: to bleach (hair) with hydrogen peroxide [3]peroxide adj (1920): having or being bleached hair "a ~ blonde"