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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.

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

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

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.