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Webster 1913 Edition

Noun.

[

Sesqui-

sulphide

(Chem.)

A sulphide, analogous to a sesquioxide, containing three atoms of sulphur to two of the other ingredient; – formerly called also

sesquisulphuret

;

as, orpiment,

As2S3

is arsenic

sesquisulphide

sesquisulphide ‎(plural sesquisulphides)

(chemistry) Any sulphide containing three sulphur atoms for every two metal atoms.