Dictionary

icosahedron

noun ico·sa·he·dron \-drən\
plural ico·sa·he·drons or ico·sa·he·dra\-drə\

Definition of ICOSAHEDRON

:  a polyhedron having 20 faces

Origin of ICOSAHEDRON

Greek eikosaedron, from eikosi twenty + -edron -hedron — more at vigesimal
First Known Use: 1570

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