noun
- plural of trihedron; three-dimensional geometric figures each having three plane faces meeting at a common vertex
Usage: geometry; mathematics
Examples
- The mathematician studied the properties of various trihedra in her research.
- Students learned to identify different types of trihedra in their geometry class.
- The crystal structure contained several trihedra arranged in a regular pattern.
- Engineers used trihedra to model the corner joints in the building framework.
- The textbook included diagrams showing how trihedra are formed by intersecting planes.