# octahedron

oc·ta·he·dronnoun

*pl.*-·drons or -·dra

a solid figure with eight plane surfaces

Origin of octahedron

Classical Greek*oktaedron*, neuter of

*oktaedros:*see octa- and -hedron

## octahedron

noun

*pl.*

**oc·ta·he·drons,**or

**oc·ta·he·dra**

A polyhedron with eight faces.

Origin of octahedron

Greek*oktaedron*

*from neuter of*

*oktaedros*

*having eight sides*

*okta-*

*octo-*

*-edros*

*sided*; see

**-hedron**.

**octahedron**

## octahedron

Noun

(*plural* octahedra *or* octahedrons)

- (geometry) a polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids.

Origin

From Ancient Greek *á½€ÎºÏ„ÏŽ* (oktÅ, “eight") + *á¼•Î´ÏÎ±* (hedra, “seat").