/duy sul"fuyd, -fid/ , n. Chem.
1. (in inorganic chemistry) a sulfide containing two atoms of sulfur, as carbon disulfide, CS 2 .
2. (in organic chemistry) a sulfide containing the bivalent group -SS-, as diethyl disulfide, C 4 H 10 S 2 .
Also, disulphide .
[ 1860-65; DI- 1 + SULFIDE ]