Online Encyclopedia

OCTAHEDRON (Gr. 6K-rw, eight, Mpa, base)

Online Encyclopedia
Originally appearing in Volume V19, Page 992 of the 1911 Encyclopedia Britannica.
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OCTAHEDRON (Gr. 6K-rw, eight, Mpa, base), a solid bounded by eight triangular faces; it has 6 vertices and 12 edges. The regular octahedron has for its faces equilateral triangles; it is the reciprocal of the cube. Octahedra having triangular faces other than equilateral occur as crystal forms. See POLYHEDRON and CRYSTALLOGRAPHY.
End of Article: OCTAHEDRON (Gr. 6K-rw, eight, Mpa, base)
OCRICULUM (mod. Otricoli)
OCTAVE (from Lat. octavus, eighth, octo, eight)

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