thermocouple
"thermocouple" is a 12-letter English headword indexed on PlainSpell.
The verdict
“thermocouple” is uncommon English (frequency #79,128 among 27,828 “T” headwords), classed as a noun. The kind of spelling people second-guess.
- #79,128
- frequency rank, English
- 27,828
- “T” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A transducer consisting of two different metals welded together at each end; a voltage is produced that is proportional to the difference in temperature between the two junctions (one of which is n...
| Property | Value |
|---|---|
| Headword | thermocouple |
| Language | English |
| Part of speech | Noun |
| Letters | 12 |
| Frequency rank | #79,128 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “thermocouple” sits in English frequency
Rare enough to double-check
thermocouple is uncommon English at frequency #79,128 among 27,828 “T” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A transducer consisting of two different metals welded together at each end; a voltage is produced that is proportional to the difference in temperature between the two junctions (one of which is n...".
No generated misspelling entries exist for thermocouple in our index, suggesting the orthography follows predictable English patterns. No close-neighbour confusable shows up for this headword in our dataset, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: From thermo- + couple. The correct English form is thermocouple, spelled T-H-E-R-M-O-C-O-U-P-L-E.
Definition
- 1A transducer consisting of two different metals welded together at each end; a voltage is produced that is proportional to the difference in temperature between the two junctions (one of which is normally held at a known temperature)
Etymology
From thermo- + couple.
This word in other languages
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.
Frequently Asked Questions
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Using “thermocouple”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is T-H-E-R-M-O-C-O-U-P-L-E - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Other uncommon English words near this rank
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.