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trigonal
[ trig-uh-nl ]
adjective
- of, relating to, or shaped like a triangle; having three angles; triangular.
- Crystallography. having threefold symmetry.
trigonal
/ ˈtrɪɡənəl /
adjective
- See triangularanother word for triangular
- Alsorhombohedral relating or belonging to the crystal system characterized by three equal axes that are equally inclined and not perpendicular to each other
trigonal
/ trī-gō′nəl /
- Relating to a crystal having three axes of equal length intersecting at oblique angles. This crystal system is considered a subset of the hexagonal system. The mineral quartz has trigonal crystals.
- Also called rhombohedral
- See illustration at crystal
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Other Words From
- trigo·nal·ly adverb
- sub·trigo·nal adjective
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Example Sentences
Orifice either large and rounded-trigonal, or small and oval, either entire or less frequently toothed.
Parietes ribbed, mottled purplish-red; orifice broad, trigonal, hardly toothed.
The horns are trigonal, laterally compressed and knotted on the upper edge.
When the whorls are angulated, a trigonal aperture is the result, as in many species of Trochus.
Mactracea (plates, fig. 77 to 88), the cartilage placed in a trigonal pit, with a small external ligament.
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