S1U1L1F4I1D2E1
11 points
SULFIDE is validvalid
a sulfur compound [n SULFIDES]
a compound of an element or radical with sulphur, also SULFID, SULPHID, SULPHIDE [n -S]
a sulfur compound [n SULFIDES]
a compound of an element or radical with sulphur, also SULFID, SULPHID, SULPHIDE [n -S]