from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Being trigonal in two different ways on the same axis; i.e., of a six-sided object, having only the alternate interfacial angles equal
from The Century Dictionary and Cyclopedia
- In crystallography, twice-three-sided. A ditrigonal prism is a six-sided prism, the hemihedral form of a twelve-sided or dihexagonal prism.
- Noting a type of symmetry characterized by a trigonal axis (that is, one of threefold symmetry), in which axis three planes of symmetry intersect. See symmetry.
From di- + trigonal (Wiktionary)
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