icosahedron noun. [,ʌɪkɒsǝ'hi:drǝn, -'hɛd-] Also icosahedrum, eicosahedron. Pl. -dra [-drǝ], -drons. L16.
[Late Latin icosahedrum (medieval Latin also -hedron) from Greek eikosaedron, formed as ICOS-: see -HEDRON.]
A solid figure or object with twenty plane faces; esp. (more fully regular icosahedron) one with twenty equal equilateral triangular faces.

■ icosahedral adjective having the form of an icosahedron; having twenty faces: E19.

■ icosahedrally adverb so as to form icosahedra L20.

[TahlilGaran] English Dictionary ▲