bipyramid

[bahy-pir-uh-mid]

noun Crystallography.

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

Also called dipyramid.

Origin:
bi-¹ + pyramid

Related forms

bi·py·ram·i·dal

[bahy-pi-ram-i-dl] , adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Bipyramid is always a great word to know.

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a scrap or morsel of food left at a meal.

a gadget; dingus; thingumbob.

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Collins

World English Dictionary

bipyramid (ˌbaɪˈpɪrəmɪd)

—n
	a geometrical form consisting of two pyramids with a common polygonal base

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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bipyramid

bi·pyr·a·mid