Etymograph

English

isoeccentric

Isoeccentric comes from Ancient Greek ἔκκεντρος ‘not occupying a cardinal point’, and goes back to Proto-Indo-European *ḱéntrom.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*ḱéntrom‘pointed tool’reconstructed
  2. Proto-Hellenicc. 2200–1600 BCE*kéntronreconstructed
  3. Ancient Greekc. 800–300 BCEκέντρονkéntron‘something with a sharp point: point, spike, spur’
  4. Ancient Greek, derivedc. 800–300 BCEἔκκεντροςékkentros‘not occupying a cardinal point’
  5. Medieval Latinmoderneccentricus
  6. Middle Frenchc. 1400–1600excentrique
  7. English1500–presenteccentric
  8. Englishtodayisoeccentric

attested reconstructed ? uncertain or disputed

Earlier history uncertain.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*ḱéntrom‘pointed tool’reconstructed
  2. Proto-Hellenicc. 2200–1600 BCE*kéntronreconstructed
  3. Ancient Greekc. 800–300 BCEκέντρονkéntron‘something with a sharp point: point, spike, spur’
  4. Ancient Greek, derivedc. 800–300 BCEἔκκεντροςékkentros‘not occupying a cardinal point’
  5. Medieval Latinmoderneccentricus
  6. Middle Frenchc. 1400–1600excentrique
  7. English1500–presenteccentric
  8. Englishtodayisoeccentric

A compound of iso- + eccentric

Ancient Greek ἴσος ‘equal’

English iso-

Proto-Indo-European *ḱéntrom ‘pointed tool’

…

Ancient Greek κέντρον ‘something with a sharp point: point, spike, spur’

Ancient Greek ἔκκεντρος ‘not having the earth as the center of an orbit’

Medieval Latin eccentricus

Middle French excentrique

English eccentric

Linked words

through Proto-Hellenic *kéntron

centrale, 15 more

through Ancient Greek κέντρον ‘something with a sharp point: point, spike, spur’

center, central, centre, kendra, alcantara, concentric, cento, centrum, 16 more

Today it means

adj At the centre horizontally but eccentric vertically (or the converse)

Language periods are conventional ranges, not dates for this word.

Etymograph / Proto-Indo-European *ḱéntrom / isoeccentric

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