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OCSPOct
Octa-
Octachord
Octad
octadecanoic acid
Octaedral
Octaemeron
Octagon
octagonal
Octagynous
Octahedral
Octahedral borax
Octahedral cleavage
Octahedral iron ore
Octahedrite
-- Octahedron --
octal
octal digit
octal forty
octal notation
octal number system
octal numeration system
Octamerous
Octameter
octander
Octandria
octandrian
octane
octane number
octane rating
octanedioic acid
Octangular
Octahedron
Oc`ta`he´dron
| n. | 1. | (Geom.) A solid bounded by eight faces. The regular octahedron is contained by eight equal equilateral triangles. |
| Noun | 1. |  octahedron - any polyhedron having eight plane faces |