jaksollisen

Jaksollisen is the genitive singular form of the Finnish adjective jaksollinen, which means periodic. The base form jaksollinen is used to describe phenomena or systems that exhibit repetition at regular intervals or follow a repeating pattern. In Finnish grammar, adjectives decline to agree with the noun in number and case, so jaksollisen appears in phrases where the described noun is in genitive singular, such as jaksollisen järjestelmän säännöt or jaksollisen taulukon rakenne.

In scientific and academic usage, jaksollinen is common to describe periodicity in different fields. In chemistry, the term appears in expressions related to the periodic system or periodic law (for example, jaksollinen järjestelmä or jaksollinen laki referring to the periodic table and its underlying pattern). In mathematics, the related form jaksollinen funktio denotes a periodic function, a function that repeats its values at regular intervals. The genitive form jaksollisen thus commonly appears in phrases that attribute periodic properties to a noun, as in jaksollisen ilmiön tutkimus (the study of a periodic phenomenon).

Etymology and composition: jaksollinen is built from jakso, meaning period or interval, plus the suffix -llinen, which marks the word as an adjective indicating characteristic belonging or relation. The term is widely used in Finnish-language scientific literature, textbooks, and dictionaries to convey the idea of regular recurrence or structured repetition.

See also: jakso, jaksollinen järjestelmä, jaksollinen taulukko, jaksollinen laki, jaksollinen funktio.