: an enzyme that hydrolyzes ATP
especially : one that hydrolyzes ATP to ADP and inorganic phosphate

Word History

First Known Use

1946, in the meaning defined above

Time Traveler
The first known use of ATPase was in 1946

Dictionary Entries Near ATPase

Cite this Entry

“ATPase.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ATPase. Accessed 16 Apr. 2024.

Medical Definition

: an enzyme that hydrolyzes ATP
especially : one that hydrolyzes ATP to ADP and inorganic phosphate

called also adenosine triphosphatase

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