octahedra

Noun

Plural form of 'octahedron', a polyhedron with eight faces.

ریشه

Derived from the Greek words 'oktō' meaning 'eight' and 'hedra' meaning 'base' or 'seat'.

مثال

• The crystals formed perfect octahedra.
• The octahedra have symmetrical faces.
• The mineral exhibits octahedra as its crystal structure.