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bipyramid

American  
[bahy-pir-uh-mid] / baɪˈpɪr ə mɪd /

noun

Crystallography.

  1. a form symmetrical about a plane dividing it into two pyramids.

bipyramid British  
/ ˌbaɪˈpɪrəmɪd /

noun

  1. a geometrical form consisting of two pyramids with a common polygonal base

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • bipyramidal adjective

Etymology

Origin of bipyramid

bi- 1 + pyramid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It may be considered as the hemihedral form of the ditetragonal bipyramid.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various

The general form is bounded by twelve scalene triangles and is a ditrigonal bipyramid.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.