pl. -·drons or -·dra
a solid figure with eight plane surfaces
Origin of octahedronClassical Greek oktaedron, neuter of oktaedros: see octa- and amp; -hedron
nounpl. oc·ta·he·drons or oc·ta·he·dra
A polyhedron with eight faces.
Origin of octahedronGreek oktaedron, from neuter of oktaedros, having eight sides : okta-, octo- + -edros, sided; see –hedron.
(plural octahedra or octahedrons)
From Ancient Greek á½€ÎºÏ„ÏŽ (oktÅ, “eight") + á¼•Î´ÏÎ± (hedra, “seat").