Definition of dipyramid
: a crystal consisting of two pyramids base to base, the one geometrically a mirror image of the other with respect to the horizontal plane of symmetry dipyramids occur in the tetragonal, hexagonal, and orthorhombic systems and may have corresponding orthorhombic, tetragonal, ditetragonal, hexagonal, or dihexagonal symmetry
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of dipyramid
di- + pyramid
Seen and Heard
What made you want to look up dipyramid? Please tell us where you read or heard it (including the quote, if possible).