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proto- +‎ sulphide


protosulphide (plural protosulphides)

  1. (chemistry) That one of a series of sulphides of any element which has the lowest proportion of sulphur; a sulphide with only one atom of sulphur in the molecule.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for protosulphide in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)