icosahedron

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noun ico·sa·he·dron \-drən\

Definition of icosahedron

plural

icosahedrons

or

icosahedra

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  1. :  a polyhedron having 20 faces

Origin and Etymology of icosahedron

Greek eikosaedron, from eikosi twenty + -edron -hedron — more at vigesimal


First Known Use: 1570


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