bipyramid
noun Date: 1897 a crystal consisting of two identical pyramids base to base • bipyramidal adjective

New Collegiate Dictionary. 2001.

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  • Bipyramid — For Dipyramid, see mountain and Dipyramid (Alaska). Set of bipyramids (Example hexagonal form) Faces 2n triangles Edges 3n Vertices n + 2 …   Wikipedia

  • bipyramid — (ˈ)bī+ noun Etymology: bi (I) + pyramid : dipyramid * * * bipyramidal /buy pi ram i dl/, adj. /buy pir euh mid/, n. Crystall. a form symmetrical about a plane dividing it into two pyramids. Also called dipyramid …   Useful english dictionary

  • bipyramid — bipyramidal /buy pi ram i dl/, adj. /buy pir euh mid/, n. Crystall. a form symmetrical about a plane dividing it into two pyramids. Also called dipyramid. [BI 1 + PYRAMID] * * * …   Universalium

  • bipyramid — noun A dipyramid …   Wiktionary

  • bipyramid — bi·pyramid …   English syllables

  • Hexagonal bipyramid — Type bipyramid Faces 12 triangles Edges 18 Vertices 8 Face configu …   Wikipedia

  • Octagonal bipyramid — Type bipyramid Faces 16 triangles Edges 24 Vertices 10 Face configurat …   Wikipedia

  • Decagonal bipyramid — Type bipyramid Faces 20 triangles Edges 30 Vertices 12 Face configurat …   Wikipedia

  • Pentagonal bipyramid molecular geometry — In chemistry a pentagonal bipyramid (or dipyramid) is a molecular geometry with one atom at the centre with seven ligands at the corners of a pentagonal dipyramid. A perfect pentagonal bipyramid belongs to the molecular point group D5h . The… …   Wikipedia

  • Johnson solid — The elongated square gyrobicupola (J37), a Johnson solid …   Wikipedia

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