tetrad
/ˈtɛtɹæd/
"tetrad" is a 6-letter English headword indexed on PlainSpell.
The verdict
“tetrad” is an uncommon English word, ranked #88,923 in English word frequency and used as a noun.
- #88,923
- frequency rank, English
- 6
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A group of four things.
| Property | Value |
|---|---|
| Headword | tetrad |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈtɛtɹæd/ |
| Letters | 6 |
| Frequency rank | #88,923 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “tetrad” sits in English frequency
Spelling & Dictionary Insight
The English entry for tetrad is 6 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈtɛtɹæd/. Corpus data places it at rank #88,923 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 7 distinct senses for this headword, so context determines which meaning a reader should apply.
Zero misspellings are on record for tetrad in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. No confusable counterpart is on file for this word, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From Ancient Greek τετράς (tetrás), analysable as tetra- + -ad. The correct English form is tetrad, spelled T-E-T-R-A-D.
Definition
- 1A group of four things.
- 2Two pairs of sister chromatids (a dyad pair) aligned in a certain way and often on the equatorial plane during the meiosis process.
- 3A group of four haploid and immature pollen grains in tetrahedral fashion produced by meiotic microsporogenesis.
- 4A unit of land area of two by two (that is, four) square kilometres.
- 5A tetravalent atom or radical.
- 6A group of four basis vectors for a four-dimensional manifold in differential geometry.
- 7A chord comprised of four notes; a tetrachord.
Etymology
From Ancient Greek τετράς (tetrás), analysable as tetra- + -ad.
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 “tetrad”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is T-E-T-R-A-D - every other letter order is a misspelling in standard orthography.
- Say it as /ˈtɛtɹæd/ (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.