- circleA two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from a given point (center).
- circularOf or relating to a circle.
- circuleA small circle, used in printed matter as a reference mark to refer the reader to a note.
- circulizeSynonym of encircle.
- circulusA social group of reptiles where there is interaction and personal exchange between individuals.