# diphosphate

> English word · Noun · frequency rank #83,187

## Definitions
1. any salt or ester containing two phosphate groups
2. any salt or ester of diphosphoric acid; pyrophosphate

## Etymology
From di- + phosphate.

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