# thioic acid

> English word · Noun

## Definitions
1. Any organic compound formally derived from a carboxylic acid by replacing either or both of the carboxyl oxygen atoms with sulfur - R-C(S)OH, R-C(O)SH or R-C(S)SH

## Etymology
See thio- (“sulfur”).

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