English
icosahedron
Icosahedron comes from Ancient Greek εἰκοσάεδρον.
- Ancient Greekc. 800–300 BCEεἰκοσάεδρονeikosáedron
- Englishtodayicosahedron
attested reconstructed ? uncertain or disputed
Lineage
- Ancient Greekc. 800–300 BCEεἰκοσάεδρονeikosáedron
- Englishtodayicosahedron
A compound of εἴκοσι ‘twenty’ + ἕδρα ‘face of a geometrical solid’
Proto-Indo-European *dwi- ‘two’
Proto-Indo-European *déḱm̥ ‘ten’
Proto-Indo-European *(h₁)wídḱm̥ti ‘twenty’
Proto-Hellenic *ewī́kəti
Ancient Greek εἴκοσι ‘twenty’
Proto-Indo-European *sed- ‘to sit’
Proto-Indo-European *sedreh₂
Proto-Hellenic *hédrā
Ancient Greek ἕδρα ‘face of a geometrical solid’
Every English word from Ancient Greek εἰκοσάεδρον
Today it means
noun A polyhedron with twenty faces.
Language periods are conventional ranges, not dates for this word.
Etymograph / Ancient Greek εἰκοσάεδρον / icosahedron