kvadratni

Kvadratni is an adjective used in several South Slavic languages, including Croatian, Bosnian, and Serbian, meaning square or relating to a square. It is used to describe geometric shapes, mathematical concepts, and things characterized by square form or operation. In geometry it can describe an object with four equal sides and four right angles, though the noun kvadrat is commonly used for the shape itself.

In mathematics, kvadratni is used in terms such as kvadratni broj (square number), kvadratna jednadžba (quadratic equation), kvadratna matrica (square matrix), and kvadratna funkcija (quadratic function). The term is also used in a broader sense to indicate squareness or second-degree relationships, analogous to quadratic in English.

Etymology: The word is derived from kvadrat, meaning square, which in turn traces back to Proto-Slavic forms and ultimately to Latin quadratus, with influence from Germanic and other European technical vocabularies in mathematical language. The adjective form follows standard Slavic patterns for gender and number.

Usage notes: In feminine and neuter forms, the adjective changes to kvadratna and kvadratno, respectively; plural forms are kvadratni (masculine), kvadratne (feminine or neuter). In everyday speech, the noun kvadrat is more common to denote the shape itself, while kvadratni is used to describe properties, quantities, or relationships associated with squares.

See also: kvadrat (square), kvadratni broj, kvadratna jednadžba. The term appears across Croatian, Bosnian, and Serbian mathematical and geometric terminology.