triangle inequality
Detailed reference entry for the English word "triangle-inequality", 19-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Wiktionary, and usage frequency ranked against an open word-frequency list covering the top 100,000 English words. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "triangle-inequality" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "triangle-inequality" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.
The verdict
“triangle inequality” is outside the top-ranked English vocabulary, used as a proper noun - the kind of word writers most often double-check.
- Unranked
- below top-frequency English
- 19
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The inequality that states that the magnitude of the sum of two vectors is less than or equal to the sum of the magnitudes of the vectors.
Compare similar words
See how triangle inequality compares against similar English words.
Browse all word comparisons →| Property | Value |
|---|---|
| Headword | triangle inequality |
| Language | English |
| Part of speech | Proper noun |
| Letters | 19 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “triangle inequality” sits in English frequency
Spelling & Dictionary Insight
The English entry for triangle inequality is 19 letters long, classified as a proper noun. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.
No misspelling variants are generated for triangle inequality in our index, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.
No explicit etymology string is stored for this entry, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is triangle inequality, spelled T-R-I-A-N-G-L-E- -I-N-E-Q-U-A-L-I-T-Y, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.
Definition
- 1The inequality that states that the magnitude of the sum of two vectors is less than or equal to the sum of the magnitudes of the vectors.
- 2The inequality that states that the distance between two points is less than or equal to the sum of the distances between the first two points and some third point.
- 3Either of the above two inequalities, considered as one of the axioms which a function must satisfy to be a norm or metric respectively.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.
Cite this page
Free to reuse with attribution (CC BY-SA). Copy the citation:
PlainSpell, “triangle inequality, English word data” (May 6, 2026). Derived from Wiktionary (kaikki.org, CC BY-SA) and an open word-frequency list. https://plainspell.com/en/word/triangle-inequality
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Using “triangle inequality”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is T-R-I-A-N-G-L-E- -I-N-E-Q-U-A-L-I-T-Y - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Nearby English words
Other entries that begin with the letter T in our English index: