hartree
noun
hartree is spelled H-A-R-T-R-E-E: 7 letters. It appears about once in every 12 million words in written English, the 103,949th most frequent word form (wordfreq, 2021 data). As a noun, hartree means “The atomic unit of energy, defined as 2R_∞hc, where R_∞ is the Rydberg constant, h is the Planck constant and c is the speed of light. It equals…” (English Wiktionary, September 2026). The plural of hartree is hartrees.
How many letters and syllables are in hartree?
| Letters | 7: H-A-R-T-R-E-E |
|---|---|
| In writing | about once in every 12 million words; the 103,949th most frequent word form |
| Wrong spellings searched | none measured in search |
| Same letters |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.
How common is hartree?
Hartree appears about once in every 12 million words in written English, the 103,949th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
What rhymes with hartree?
No other word on PlainSpell ends in the same sounds as hartree.
Spelled with the same letters in another order: earther.
Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).
Forms of hartree
- hartrees plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does hartree mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The atomic unit of energy, defined as 2R_∞hc, where R_∞ is the Rydberg constant, h is the Planck constant and c is the speed of light. It equals 4.35974 attojoules.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does hartree come from?
Named after the British physicist Douglas Hartree (1897–1958).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).