heptahedron

(hep′tə hēdrən)

noun pl. heptahedrons or heptahedra

a solid figure with seven plane surfaces

Origin: ModL: see hepta- & -hedron

Related Forms:

See heptahedron in American Heritage Dictionary 4

noun pl. hep·ta·he·drons or hep·ta·he·dra (-drə)
A polyhedron with seven faces.

Related Forms:

  • hepˌta·heˈdral (-drəl) adjective
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