English
isochasm
Isochasm comes from Ancient Greek χάσμα ‘abyss, chasm’, from χᾰ́σκω ‘to yawn’, and ultimately from Proto-Indo-European *ǵʰeh₂-n.
- Proto-Indo-Europeanc. 4500–2500 BCE*ǵʰeh₂-n‘to yawn, to gape’reconstructed
- Ancient Greekc. 800–300 BCEχᾰ́σκω‘to yawn’
- Ancient Greek, derivedc. 800–300 BCEχάσμαkhásma‘abyss, chasm’
- Englishtodayisochasm
attested reconstructed ? uncertain or disputed
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*ǵʰeh₂-n‘to yawn, to gape’reconstructed
- Ancient Greekc. 800–300 BCEχᾰ́σκω‘to yawn’
- Ancient Greek, derivedc. 800–300 BCEχάσμαkhásma‘abyss, chasm’
- Englishtodayisochasm
Every English word from Proto-Indo-European *ǵʰeh₂-n
Today it means
noun A line connecting places on the Earth's surface that have the same mean frequency of auroras.
Language periods are conventional ranges, not dates for this word.
Etymograph / Proto-Indo-European *ǵʰeh₂-n / isochasm