oblúka

oblúka is the genitive singular form of the Slovak noun oblúk, meaning arc or bend. The word denotes a curved segment of a circle or any curved architectural or structural element. In mathematics and geometry, oblúk refers to a portion of a circle’s circumference, while in architecture and construction it can describe decorative or structural arches and curved profiles. In common usage, phrases such as dĺžka oblúka (the length of the arc) and tvar oblúka (the shape of the arc) illustrate the word’s function as a nominal object.

In Slovak grammar, oblúk is a masculine noun, and oblúka appears when the arc is the object of a sentence or a element governed by a possessive or descriptive relation. The plural form is oblúky, and the genitive plural is oblúkov. The genitive singular oblúka is used in phrases that describe measurements, characteristics, or attributes of an arc.

Etymologically, oblúk derives from a Slavic root meaning bend or curved line, with cognates appearing in other Slavic languages that describe arcs or curves. The term is widely used across disciplines such as geometry, surveying, engineering, and art, reflecting its foundational concept of a curved segment rather than a straight line.

See also oblúk, the broader concept of an arc or curved line in Slovak. The form oblúka is specifically the grammatical genitive singular used in descriptions and specifications.