English
apterium
Apterium comes from Ancient Greek πτερόν ‘feather’, and goes back to Proto-Indo-European *peth₂- ‘to fly’.
- Proto-Indo-Europeanc. 4500–2500 BCE*peth₂-1‘to fly’reconstructed
- Proto-Indo-Europeanc. 4500–2500 BCE*péth₂r̥2‘feather’reconstructed
- Proto-Hellenicc. 2200–1600 BCE*pterón2reconstructed
- Ancient Greekc. 800–300 BCEπτερόν3pterón‘feather’
- Englishearliest quotation 1918apterium3
attested reconstructed ? uncertain or disputed deepest recorded ancestor
- 1 Wiktionary, Proto-Indo-European *péth₂r̥
- 2 Wiktionary, Ancient Greek πτερόν
- 3 Wiktionary, English apterium
- Earliest quotation in Wiktionary’s entry: 1918, American Ornithologists' Union: “The two halves of the lower cervical tract are…”.
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*peth₂-Wiktionary, Proto-Indo-European *péth₂r̥‘to fly’reconstructed
- Proto-Indo-Europeanc. 4500–2500 BCE*péth₂r̥Wiktionary, Ancient Greek πτερόν‘feather’reconstructed
- Proto-Hellenicc. 2200–1600 BCE*pterónWiktionary, Ancient Greek πτερόνreconstructed
- Ancient Greekc. 800–300 BCEπτερόνWiktionary, English apteriumpterón‘feather’
- Englishearliest quotation 1918apteriumWiktionary, English apterium. Earliest quotation in Wiktionary’s entry: 1918, American Ornithologists' Union: “The two halves of the lower cervical tract are…”
Linked words
through Proto-Indo-European *peth₂- ‘to fly’
pass, mile, expansion, repeat, pen, expand, petition, compete, patent, competitor, symptom, perpetual, spawn, impetus, expanse, pennant, perpetuate, perpetuity, petulant, patina, pinion, impetuous, pata, patella, penna, petulance, 82 more
through Proto-Indo-European *péth₂r̥ ‘feather’
through Ancient Greek πτερόν ‘feather’
Today it means
noun An area of bare (featherless) skin on a bird.
Sources
Sources: Wiktionary, “apterium”; the older steps come from the Wiktionary entries for Proto-Indo-European *péth₂r̥, Ancient Greek πτερόν. 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 *peth₂- / apterium