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Webster 1913 Edition

(ŏkˊtȧ-hē′drŏn)

Noun.

[Gr.

ὀκτάεδρον

, fr.

ὀκτάεδροσ

eight-sided;

ὀκτα-

(for

ὀκτώ

eight) +

ἕδρα

seat, base, from

ἕζεσθαι

to sit.]

(Geom.)

A solid bounded by eight faces. The regular octahedron is contained by eight equal equilateral triangles.

Noun.

[Gr. eight and a base.]

In geometry, a solid contained by eight equal and equilateral triangles. it is one of the five regular bodies.