D defs.my
Entry 1 sense Webster, 1913

Peroxide

/pẽr-äk'-sīdˌ/ · Per·ox·ide · IPA /pəˈrɒksʌɪd/
01 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.
  1. 1.
    An oxide containing more oxygen than some other oxide of the same element. Formerly peroxides were regarded as the highest oxides. Cf. Per-, 2.(Chem.) See: Per-