Definition of pentahedron in English:

pentahedron

Line breaks: penta|he¦dron
Pronunciation: /ˌpɛntəˈhiːdr(ə)n
 
, -ˈhɛd-/

noun (plural pentahedra /-drə/ or pentahedrons)

A solid figure with five plane faces.
More example sentences
  • Whereas the tetrahedron is composed of four triangles, the pyramid (or pentahedron), which looks a lot like it, is composed of four triangles and a square - the base.
  • You can also have an Egyptian pentahedron square-base pyramid.
  • Then the pyramids are cut by silhouettes into a set of pentahedrons, which together constitute the centripetal pentahedron model of the visual hull.

Origin

late 18th century: from penta- 'five' + -hedron, on the pattern of words such as polyhedron.

Derivatives

pentahedral

adjective
More example sentences
  • There are two topologically distinct pentahedral graphs which, through duality, correspond to the skeletons of the square pyramid and triangular dipyramid.
  • I noticed that it was closely related to the pentahedral prism packing.

Definition of pentahedron in:

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