D defs.my
Entry 1 sense Webster, 1913

Protosulphide

· Pro·to·sul·phide · IPA
01 n. That one of a series of sulphides of any element which has the lowest proportion of sulphur; a sulphide with but one atom of sulphur in the…
  1. 1.
    That one of a series of sulphides of any element which has the lowest proportion of sulphur; a sulphide with but one atom of sulphur in the molecule.(Chem.)