Definition of heptahedron in English:

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heptahedron

Pronunciation: /ˌheptəˈhēdrən/

noun (plural heptahedrons or heptahedra /-ˈhēdrə/)

A solid figure with seven plane faces.
Example sentences
  • Around the circle - in which the heptahedron lies - another seven-fold star can be constructed.
  • Edges vanish, and it becomes a heptahedron, having three rhombic faces and four triangular faces.
  • While all of the faces are regular and vertices equivalent, the heptahedron is self-intersecting and is therefore not considered an Archimedean solid.

Derivatives

heptahedral

Pronunciation: /-ˈhēdrəl/
adjective

Origin

Late 17th century: from hepta- 'seven' + -hedron, on the pattern of words such as polyhedron.

For editors and proofreaders

Syllabification: hep·ta·he·dron

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