icosahedron
i·co·sa·he·dron / īˌkōsəˈhēdrən; īˌkäsə-/ • n. (pl. -dronsor -dra / -drə/ ) a solid figure with twenty plane faces, esp. equilateral triangular ones.DERIVATIVES: i·co·sa·he·dral / -drəl/ adj.
icosahedron
icosahedron solid contained by 20 faces. XVI. — Gr. eikosáedron, n. of adj. used sb., f. eíkosi :- *epikosi (rel. to L. vīgintī twenty) + hédrā seat, base (see SIT).
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icosahedron