Enneacontahedron

/ˌɛnɪəkɒntəˈhiːdrən/ noun

Definition

a three-dimensional geometric solid with exactly ninety flat faces.

Etymology

From Greek ennea (nine) + conta (ninety, though etymology is complex) + hedron (face). A technical geometric term for a polyhedron with 90 faces.

Kelly Says

An enneacontahedron is so rare in nature and mathematics that when mathematicians do encounter one, it's like finding an undiscovered animal—it raises questions about what other perfect ninety-sided shapes might exist hidden in equations we haven't solved yet.

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