ikkesirkulære

Ikkesirkulære is a Norwegian term that denotes something that is not circular. It is used to describe shapes or objects whose boundary or form does not conform to a circle. The word is formed from ikke, meaning not, and sirkulær, meaning circular.

In mathematics and geometry, ikk esirkulære describes any figure whose boundary cannot be described as the set of points at a constant distance from a single center. A circle is the canonical example of a sirkulær form, while most other shapes—such as ellipses, polygons (triangles, rectangles, pentagons), and irregular curves—are ikk esirkulære. The distinction is fundamental for properties that depend on symmetry and radius, and it underpins practical considerations such as fitting, bending, or rotating objects.

Outside pure geometry, the concept is used in design, architecture, and engineering to communicate deviations from roundness for aesthetic, functional, or performance reasons. For example, non-circular (ikkesirkulære) profiles may optimize aerodynamics, grip, or space utilization, or simply achieve a particular visual effect.

Orthography and usage vary in Norwegian, with possible hyphenation in formal writing (ikke-sirkulær/ikkesirkulære) depending on style guides. In general, ikk esirkulære serves as an adjective describing anything that is not a circle, distinguishing it from circular or spherical forms. See also circle, ellipse, polygon, and geometry.