(geometry) The figure (a generalised circle) definable as the locus of points P such that, for given points A, B and C, =/(\frac).

(geometry, inversive geometry) A circle or a line, the two being regarded as types of a single form.

Alternative form of generalized circle

plural of circle inversion

(geometry, inversive geometry, for a given circle with centre O and radius r) A transformation that maps any point P ≠ O to the point P’ on the ray from O through P for which OP × OP’ = r², and which maps O to the point at infinity.

(archaeology) a prehistoric monument consisting of standing stones arranged in a circle.

plural of circle lens

plural of circle-jerk

plural of circle changeup

plural of circle segment