disulfide

1. (organic chemistry) A functional group with two sulfur atoms bonded to one another, described by the following formula: R–S–S–R'.

2. (inorganic chemistry) The anion ⁻S–S⁻.

3. (inorganic chemistry) A binary compound of sulfur and another element in the ratio 2:1 (formula XS₂).Examples: "By analysing data from the James Webb Space Telescope, the researchers found evidence of dimethyl sulfide and dimethyl disulfide in the atmosphere of the planet known as K2-18b. The planet is 124 light-years away; one light-year is equivalent to nearly 6 trillion miles."