i·co·sa·he·dron 
(ī-kō′sə-hēdrən, ī-kŏs′ə-)
(ī-kō′sə-hēdrən, ī-kŏs′ə-)n. pl. i·co·sa·he·drons or i·co·sa·he·dra (-drə)
A polyhedron having 20 faces.
[Greek eikosaedron, from neuter of Greek eikosaedros, twenty-sided : eikosi, twenty; see wīktī- in the Appendix of Indo-European roots + -edros, -sided; see -HEDRON.]
i·co′sa·hedral (-drəl) adj.
icosahedron- ring-necked dove
- ring-necked duck
- ring-necked pheasant
- ring-necked snake
- ringneck snake
- Ringo
- Ring of Fire
- ring ouzel
- ringside
- ring someone's bells
- ring someone's chimes
- ring (someone's) chimes/bells
- ringtail
- ring-tailed
- ringtone
- ringtoss
- ring up
- ring up the curtain
- ringworm
- rink
- rinkhals
- rinkhals
- rinky-dink
- rinsable
- rinse