infinity : Idioms & Phrases
Circle at infinity
- an imaginary circle at infinity, through which, in geometry of three dimensions, every sphere is imagined to pass.
Webster 1913
Circular points at infinity
(Geom.) , two imaginary points at infinite distance through which every circle in the plane is, in the theory of curves, imagined to pass.
Webster 1913
Plane at infinity
(Geom.) , a plane in which points infinitely distant are conceived as situated.
