# disulfide

> English word · Noun · IPA /daɪˈsʌlfaɪd/ · frequency rank #48,705

## Definitions
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).

## Etymology
From di- + sulfide.

## Common misspellings (13)
`ddisulfide`, `dislufide`, `dissulfide`, `disuflide`, `disulfdie`, `disulffide`, `disulfidde`, `disulfied`, `disulifde`, `disullfide`, `diuslfide`, `dsiulfide`, `idsulfide`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/disulfide