from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any sulphide containing three sulphur atoms for every two metal atoms.
from the GNU version of the Collaborative International Dictionary of English
- n. A sulphide, analogous to a sesquioxide, containing three atoms of sulphur to two of the other ingredient; -- formerly called also sesquisulphuret.
sesqui- + sulphide (Wiktionary)