# persulphocyanic acid

> English word · Noun

## Definitions
1. A yellow crystalline substance, analogous to sulphocyanic acid, but containing more sulphur.

## Etymology
From per- (“of maximum proportion”) + sulphocyanic acid.

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