English
allotrope
Allotrope comes from Ancient Greek ἄλλος ‘other’, and goes back to Proto-Indo-European *h₂el-.
- Proto-Indo-Europeanc. 4500–2500 BCE*h₂el-‘beyond, other’reconstructed
- Proto-Indo-European, derivedc. 4500–2500 BCE*h₂élyos‘other, another’reconstructed
- Ancient Greekc. 800–300 BCEἄλλοςállos‘other’
- Englishtodayallotrope
attested reconstructed ? uncertain or disputed
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*h₂el-‘beyond, other’reconstructed
- Proto-Indo-European, derivedc. 4500–2500 BCE*h₂élyos‘other, another’reconstructed
- Ancient Greekc. 800–300 BCEἄλλοςállos‘other’
- Englishtodayallotrope
Proto-Indo-European *trep- ‘to turn’
Ancient Greek τρέπω ‘turn, divert, turn back, rout an enemy’
Ancient Greek τρόπος ‘a manner, style, turn, way’
Latin tropus ‘a figurative use of a word, a trope’
English trope
Linked words
through Proto-Indo-European *h₂el- ‘beyond, other’
as, all, old, adult, el, ultimate, element, elder, ultra, alter, ellen, ou, altitude, qualification, alumni, outrage, altar, adolescent, alt, abolish, alpine, alias, alto, alum, alienation, retaliate, auld, alimony, ulterior, alienate, proletariat, alp, inalienable, coalesce, exalt, foetal, althea, aad, eld, altimeter, 58 more
through Proto-Indo-European *h₂élyos ‘other, another’
else, alien, alternate, adultery, altercation, alibi, altruism, alternation, 32 more
through Ancient Greek ἄλλος ‘other’
Today it means
noun Any form of an element that has a distinctly different molecular structure to another form of the same element, with different physical properties and often different chemical properties.
Language periods are conventional ranges, not dates for this word.
Etymograph / Proto-Indo-European *h₂el- / allotrope