disulfide

noun

1. A functional group with two sulfur atoms bonded to one another, described by the following formula: R–S–S–R'.
2. The anion ⁻S–S⁻.
3. A binary compound of sulfur and another element in the ratio 2:1 (formula XS₂).

   “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.”