icosahedron
pronunciation
How to pronounce icosahedron in British English:
UK ['aɪkəsə'hedrən]
How to pronounce icosahedron in American English:
US [ˌaɪkoʊsə'hidrən]
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- Noun:
- any polyhedron having twenty plane faces
Word Origin
- icosahedron (n.)
- 1560s, from Greek eikosahedron, neuter of eikosahedros, from eikosi "twenty" + -hedra "seat, base, chair, face of a geometric solid," from PIE root *sed- (1) "to sit" (see sedentary). Greek eikosi is from PIE *wikmti- "twenty," from *wi- "in half," hence "two" + (d)kmti-, from root *dekm- "ten" (see ten).