bipyramid

noun
bi·​pyr·​a·​mid | \(ˌ)bī-ˈpir-ə-mid \

Definition of bipyramid 

: a crystal consisting of two identical pyramids base to base

Other Words from bipyramid

bipyramidal \(ˌ)bī-​pə-​ˈra-​mə-​dᵊl \ adjective

First Known Use of bipyramid

1824, in the meaning defined above

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The first known use of bipyramid was in 1824

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