Trigonal, pronounced /traɪˈɡɒn.əl/, refers to a shape with three corners or vertices. The spelling of "trigonal" is derived from the word "trigon," which means triangle in Greek. The -al suffix indicates that it is an adjective, often used to describe chemical structures or crystals. The IPA phonetic transcription breaks down the pronunciation of the word into individual sounds, including the long "i" sound, the hard "g" sound, and the emphasis on the second syllable.
Trigonal is an adjective that describes something with a threefold symmetry or a shape characterized by three sides or angles. Derived from the Latin word "trigonus," meaning "three-cornered," the term is commonly used in mathematics, chemistry, crystallography, and geometry to describe objects or structures that possess three-fold rotational or reflectional symmetry.
In geometry, trigonal commonly refers to a polygon with three sides, also known as a triangle. The angles formed within a trigonal shape always add up to 180 degrees. Trigonal is often used to classify crystals, specifically those that exhibit three axes of symmetry, resulting in a three-dimensional arrangement with identical faces, corners, and edges.
In chemistry, trigonal may refer to a molecular geometry where a central atom is bonded to three surrounding atoms. For example, molecules like borane and nitrate ion exhibit trigonal geometries, with the central atom surrounded by three bonding pairs of electrons and no lone pair.
Trigonal systems or elements can be found in various natural and man-made structures. Crystals, minerals, and symmetric molecules often possess trigonal symmetry, contributing to their unique properties and behavior. The term trigonal is crucial in understanding the classification and characterization of these objects and their physical properties.
Triangular; relating to a trigonum.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Having three angles or corners; in bot., having three angles, the faces being convex.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "trigonal" is derived from the Latin word "trigonus", which in turn comes from the Greek word "tri-", meaning "three", and "gonon", meaning "angle" or "corner". In geometry, trigonal refers to a shape or structure that has three angles or sides.