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definition of the word circle

by the Wiktionnary

Wikipedia

 Singular circle Plural circles

circle (plural circles)

1. (geometry): A two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from another point.
The set of all points (x, y) such that (x − 1)2 + y2 = r2 is a circle of radius r around the point (1, 0).
2. A two-dimensional geometric figure, a disk, consisting of the set of all those points of a plane at a distance less than or equal to a fixed distance from another point.
3. Any thin three-dimensional equivalent of the geometric figures.
Put on your dunce-cap and sit down on that circle.
4. A curve that more or less forms part or all of a circle.
move in a circle
5. Orbit.
6. A specific group of persons.
inner circle
circle of friends
7. (cricket) A line comprising two semicircles of 30 yds radius centred on the wickets joined by straight lines parallel to the pitch used to enforce field restrictions in a one-day match.

• (two-dimensional outline geometric figure): coil (not in mathematical use), ring (not in mathematical use), loop (not in mathematical use)
• (two-dimensional solid geometric figure): disc/disk (in mathematical and general use), round (not in mathematical use; UK & Commonwealth only)
• (curve): arc, curve
• (orbit): orbit Definition from WiktionaryContent avaible with GNU Free Documentation License   2007-2019 © wordbyletter.com