# ATPase

> English word · Noun · IPA /eɪtiːˈpiːeɪz/ · frequency rank #51,549

## Definitions
1. A type of enzyme which works to convert adenosine triphosphate (ATP) into adenosine diphosphate (ADP) and a free phosphate ion, thereby releasing energy to be used in cellular activity.

## Etymology
From ATP + -ase.

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