Etymograph

English

quadrat

Quadrat comes from Latin quadrō ‘make square’, from quattuor ‘four’, and ultimately from Proto-Indo-European *kʷetwṓr.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*kʷetwṓr1reconstructed
  2. Proto-Italicc. 1500–700 BCE*kʷettwōr1‘four’reconstructed
  3. Latinc. 75 BCE–200 CEquattuor1‘four’
  4. Latinc. 75 BCE–200 CEquadrus1‘square’
  5. Latinc. 75 BCE–200 CEquadrō2‘make square’next step skipped: Latin quadrātus
  6. Latinc. 75 BCE–200 CEquadrātum3perfect passive participle of quadrō
  7. Englishtodayquadrat3

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin quadro
  2. 2 Wiktionary, Latin quadratum
  3. 3 Wiktionary, English quadrat

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*kʷetwṓrWiktionary, Latin quadroreconstructed
  2. Proto-Italicc. 1500–700 BCE*kʷettwōrWiktionary, Latin quadro‘four’reconstructed
  3. Latinc. 75 BCE–200 CEquattuorWiktionary, Latin quadro‘four’
  4. Latinc. 75 BCE–200 CEquadrusWiktionary, Latin quadro‘square’
  5. Latinc. 75 BCE–200 CEquadrōWiktionary, Latin quadratum‘make square’next step skipped: Latin quadrātus
  6. Latinc. 75 BCE–200 CEquadrātumWiktionary, English quadratperfect passive participle of quadrō
  7. EnglishtodayquadratWiktionary, English quadrat

Linked words

through Proto-Indo-European *kʷetwṓr

four, 30 more

through Latin quattuor ‘four’

cater, cadre, quatre, cuatro, quatrain, 28 more

through Latin quadrus ‘square’

squadron, 13 more

through Latin quadrō ‘make square’

square, squad, quarry, 10 more

Another origin of quadrat

  1. Proto-Indo-Europeanc. 4500–2500 BCE*kʷetwṓruncertain
  2. Proto-Italicc. 1500–700 BCE*kʷettwōr‘four’uncertain
  3. Latinc. 75 BCE–200 CEquattuor‘four’uncertain
  4. Latinc. 75 BCE–200 CEquadrus‘square’uncertain
  5. Latinc. 75 BCE–200 CEquadrō‘make square’next step skipped: Latin quadrātus
  6. Latinc. 75 BCE–200 CEquadrātum‘square’uncertainperfect passive participle of quadrō
  7. Frenchc. 1600–presentcadratuncertain
  8. Englishtodayquadrat

Attested since 1683. So called because the basic quadrat, the em quadrat, has a square face, having the same width as the height of a line of type.

Today it means

noun An area of land, marked for studying its plants, animals, soil, natural processes, etc.

Sources

Sources: Wiktionary, “quadrat”; the older steps come from the Wiktionary entries for Latin quadro, Latin quadratum. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *kʷetwṓr / quadrat

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