Definitions

1. noun

Plural of octahedron, especially in geometry; a polyhedron with eight faces, each of which is a triangle.

“The mathematician studied the properties of octahedra in his research paper.”

2. noun

In chemistry, a cluster of eight atoms, typically metal atoms, that are bonded together in a specific geometric arrangement.

“The team of scientists discovered a new octahedra compound with unique magnetic properties.”