trigonaalisessa

Trigonaalisessa is the inessive singular form of the Finnish adjective trigonaalinen, meaning trigonal or triangular in shape or symmetry. It is used in Finnish to describe configurations that have three angles or threefold symmetry, particularly in scientific disciplines such as chemistry, crystallography, mineralogy, and geometry. The base form trigonaalinen is common in technical vocabulary, and trigonaalisessa is one of its inflected forms used to indicate location or state: “in a trigonal form” or “in a trigonal arrangement.”

In Finnish grammar, adjectives decline according to case and number. For singular inessive, the ending is -ssa, yielding trigonaalisessa. Related forms include trigonaalisen (genitive singular) and trigonaalista (partitive singular). In plural, the inessive form is trigonaalisissa, while the nominative plural is trigonaaliset. These inflections allow the term to modify nouns such as asento (position), muoto (shape), or symmetria (symmetry), among others.

Common usage is predominantly technical. For example, molekyyli voidaan olla trigonaalisessa asennossa, meaning the molecule is in a trigonal arrangement. Kide voi olla trigonaalisessa tilassa, referring to a crystal structure in a trigonal state. While everyday language rarely requires this form, trigonaalisessa appears regularly in scientific descriptions of geometric configurations and molecular geometry where threefold symmetry is relevant.

See also: trigonaalinen, trigonality, trigonal geometry, crystal symmetry.