Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
(the length of) a straight line that reaches from one point on the edge of a round shape or object, through its centre, to a point on the opposite edge:
the distance from one side to the opposite side of a circle, measured by a line passing through the center of the circle:
Share your knowledge with the community
Browse our collection of 300,000+ community-written definitions
