English

icosioctahedron

From icosi- + octa- + -hedron.

Formed from icosi- + octa- + -hedron

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 *oḱtṓw ‘eight’

Proto-Hellenic *oktṓ ‘eight’

Ancient Greek ὀκτώ ‘eight’

English octa-

Today it means

noun A polyhedron with twenty-eight faces.

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

Etymograph / icosioctahedron