octahedron

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oc·ta·he·dron / ˌäktəˈhēdrən/ • n. (pl. -drons or -dra / -drə/ ) a three-dimensional shape having eight plane faces, esp. a regular solid figure with eight equal triangular faces. ∎  a body, esp. a crystal, in the form of a regular octahedron. DERIVATIVES: oc·ta·he·dral / -drəl/ adj.

octahedron

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octahedronAran, Arran, baron, barren, Darren, Karen, Sharon, yarran •Biafran, saffron •plastron • Saharan • Sumatran •heron, perron •rhododendron • chevron •Aaron, Charon, Dáil Eireann •apron •matron, patron •Libran •decahedron, dodecahedron, octahedron, polyhedron, tetrahedron •children • citron • grandchildren •stepchildren • godchildren •schoolchildren •Byron, Chiron, environ, Myron, siren •sporran, warren •squadron • Cochran •Andorran, Doran, Lauren, loran •cauldron •Kieran, Madeiran, schlieren •Honduran, Van Buren •Aldebaran • Auberon • Acheron •Cameron, Decameron •cateran, Lateran •veteran •dipteran, hemipteran •lepidopteran • Lutheran

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octahedron A three-dimensional, eight-sided form in which all the faces are equilateral triangles (i.e. it resembles a double pyramid). In crystallography, a crystal form in which the crystal faces cut all three crystallographic axes at equal distances.

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octahedron: see polyhedron.