icos- combining form. ['ʌɪkɒs] Also icosa- [ʌɪ'kɒsǝ], icosi- [ʌɪ'kɒsi]. See also EICOS-.
[Greek eikosi.]
Twenty.

■ i,cosidodeca'hedron noun, pl. -dra, -drons, a solid bounded by twenty equilateral triangles and twelve regular pentagons L16.

■ i,cositetra'hedron noun, pl. -dra, -drons, a solid with 24 faces M19.

[TahlilGaran] English Dictionary ▲