isothermal
adjective, noun
isothermal is spelled I-S-O-T-H-E-R-M-A-L: 10 letters and 4 syllables. It appears about once in every 5 million words in written English, the 65,114th most frequent word form (wordfreq, 2021 data). As an adjective, isothermal means “Of or pertaining to a process that takes place at constant temperature” (English Wiktionary, September 2026).
How many letters and syllables are in isothermal?
| Letters | 10: I-S-O-T-H-E-R-M-A-L |
|---|---|
| Syllables | 4 (from its American pronunciation) |
| In writing | about once in every 5 million words; the 65,114th 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 and the CMU Pronouncing Dictionary; 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 isothermal?
Isothermal appears about once in every 5 million words in written English, the 65,114th 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).
How do you pronounce isothermal?
Isothermal has 4 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What rhymes with isothermal?
No other word on PlainSpell ends in the same sounds as isothermal.
Spelled with the same letters in another order: thiomersal.
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 isothermal
- isothermals plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does isothermal mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Of or pertaining to a process that takes place at constant temperature
- 2
Of or pertaining to an isotherm
noun
- 1
An isotherm
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Isothermal in Spanish, French, German and Portuguese
In the sense of or pertaining to a process that takes place at constant temperature:
| Language | Words |
|---|---|
| French | isothermique, isotherme |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does isothermal come from?
From iso- + thermal or isotherm + -al.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).