ATPase
/eɪtiːˈpiːeɪz/
"atpase" is a 6-letter English headword indexed on PlainSpell.
The verdict
“ATPase” is an uncommon English word, ranked #51,549 in English word frequency and used as a noun.
- #51,549
- frequency rank, English
- 6
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - 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.
| Property | Value |
|---|---|
| Headword | ATPase |
| Language | English |
| Part of speech | Noun |
| IPA | /eɪtiːˈpiːeɪz/ |
| Letters | 6 |
| Frequency rank | #51,549 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “ATPase” sits in English frequency
Spelling & Dictionary Insight
The English entry for ATPase is 6 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /eɪtiːˈpiːeɪz/. Corpus data places it at rank #51,549 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "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.".
No misspelling variants are generated for ATPase in our index, a sign its spelling follows regular English conventions. Our confusable-pair dataset has no match for it, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: From ATP + -ase. The correct English form is ATPase, spelled A-T-P-A-S-E.
Definition
- 1A 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.
Synonyms
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
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Using “ATPase”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is A-T-P-A-S-E - every other letter order is a misspelling in standard orthography.
- Say it as /eɪtiːˈpiːeɪz/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.