Adjacent Words

Octahedron definitions

	Tweet

Webster's 1828 Dictionary

OCTAHE'DRON, n. [Gr. eight and a base.]
In geometry, a solid contained by eight equal and equilateral triangles. it is one of the five regular bodies.

WordNet (r) 3.0 (2005)

n
1: any polyhedron having eight plane faces

Merriam Webster's

noun (plural -drons or octahedra) Etymology: Greek oktaedron, from okta- + -edron -hedron Date: 1570 a solid bounded by eight plane faces

Oxford Reference Dictionary

n. (pl. octahedrons or octahedra) 1 a solid figure contained by eight (esp. triangular) plane faces. 2 a body, esp. a crystal, in the form of a regular octahedron. Phrases and idioms: regular octahedron an octahedron contained by equal and equilateral triangles. Derivatives: octahedral adj. Etymology: Gk oktaedron (as OCTA-, -HEDRON)

Webster's 1913 Dictionary

Octahedron Oc`ta*he"dron, n. [Gr.?, fr. ? eight-side; ? (for ? eight) + ? seat, base, from ? to sit.] (Geom.) A solid bounded by eight faces. The regular octahedron is contained by eight equal equilateral triangles.