trigonal
/'trigənl/
Definition
- Adjective:
- Having threefold symmetry: Describes a shape, structure, or crystal system characterized by symmetry around a central axis, where identical parts repeat three times in a full 360-degree rotation.
- Triangular in cross-section: Describes an object, especially in botany or zoology, whose cross-section is shaped like a triangle.
Examples of Usage
- Adjective:
- Quartz crystals often have a trigonal structure.
- The stem of the plant was trigonal, giving it a distinctive shape.
Advanced Usage
- In Crystallography: The term is used to describe a crystal system (the trigonal crystal system) that is a subdivision of the hexagonal system, characterized by a single threefold axis of rotation.
- Calcite is a mineral that crystallizes in the trigonal system.
Variants and Related Words
- Trigonaly (adv., rare): In a trigonal manner.
- Trigonal Bipyramidal (adj. phrase): A molecular geometry in chemistry where a central atom is surrounded by five atoms, forming a shape with two distinct triangular-based pyramids sharing a base.
- Trigonal Planar (adj. phrase): A molecular geometry where three atoms are arranged in a flat triangle around a central atom.
Synonyms
- Triangular: Having three angles and three sides.
- Threefold: Consisting of three parts or having triple symmetry.
Related Phrases
- Trigonal Symmetry: The specific type of symmetry characterized by a threefold rotational axis.
- The snowflake exhibits trigonal symmetry.
Adjective
-
having threefold symmetry
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