noun
- plural form of tetrahedron; three-dimensional geometric shapes with four triangular faces
Usage: geometry; mathematics
Examples
- The crystal structure contains multiple tetrahedra arranged in a regular pattern.
- Students learned to calculate the volume of tetrahedra in geometry class.
- The molecular model showed tetrahedra connected at their vertices.
- Regular tetrahedra have four identical equilateral triangular faces.
- The architect designed the building using interlocking tetrahedra.
- Scientists observed tetrahedra forming in the crystallization process.