What is circle?

  • (noun): Any circular or rotating mechanism.
    Synonyms: round
    See also — Additional definitions below


A circle is a simple shape of Euclidean geometry that is the set of all points in the plane that are equidistant from a given point, the centre. The distance between any of the points and the centre is called the radius.

Read more about Circle.

Some articles on circle:

Descartes' Theorem - Definition of Curvature
... Descartes' theorem is most easily stated in terms of the circles' curvatures ... The curvature (or bend) of a circle is defined as k = ±1/r, where r is its radius ... The larger a circle, the smaller is the magnitude of its curvature, and vice versa ...
Circle, Montana - Demographics
... There were 291 households out of which 27.8% had children under the age of 18 living with them, 56.0% were married couples living together, 5.5% had a female householder with no husband present, and 36.1% were non-families. 34.4% of all households were made up of individuals and 19.6% had someone living alone who was 65 years of age or older ...
Wolfram & Hart - Operations - Circle of The Black Thorn
... The members of the circle act as the earthly instruments of the Senior Partners, charged with being the driving force behind Wolfram Hart's apocalyptic plans ... The members of the Circle do this not from a belief in evil per se, but because being a Black Thorn allows them to amass power for themselves and wield ... The Circle's lineup in 2004 is Archduke Sebassis Senator Helen Brucker Cyvus Vail Ed, Grand Potentate of the Fell Brethren the leader of the Sahrvin Clan ...
Osculating Circle
... In differential geometry of curves, the osculating circle of a sufficiently smooth plane curve at a given point p on the curve has been traditionally defined as the circle passing ... This circle, which is the one among all tangent circles at the given point that approaches the curve most tightly, was named circulus osculans (Latin for "kissing circle") by Leibniz ... The center and radius of the osculating circle at a given point are called center of curvature and radius of curvature of the curve at that point ...
Lucius Cary, 2nd Viscount Falkland - Great Tew Circle
... For more details on this topic, see Great Tew Circle ... of study, and he assembled a cultured circle, whom the near neighbourhood of the university and his own brilliant qualities attracted to his house ...

More definitions of "circle":

  • (noun): Movement once around a course.
    Synonyms: lap, circuit
  • (noun): Something approximating the shape of a circle.
    Example: "The chairs were arranged in a circle"
  • (noun): An unofficial association of people or groups.
    Synonyms: set, band, lot
  • (verb): Move in circles.
    Synonyms: circulate
  • (noun): A curved section or tier of seats in a hall or theater or opera house; usually the first tier above the orchestra.
    Example: "They had excellent seats in the dress circle"
    Synonyms: dress circle
  • (verb): Travel around something.
    Example: "Circle the globe"
  • (noun): Ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point.
    Example: "He calculated the circumference of the circle"
  • (verb): Form a circle around.
    Synonyms: encircle

Famous quotes containing the word circle:

    A beauty is not suddenly in a circle. It comes with rapture. A great deal of beauty is rapture. A circle is a necessity. Otherwise you would see no one. We each have our circle.
    Gertrude Stein (1874–1946)

    The passion of love is essentially selfish, while motherhood widens the circle of our feelings.
    Honoré De Balzac (1799–1850)

    ... in any war a victory means another war, and yet another, until some day inevitably the tides turn, and the victor is the vanquished, and the circle reverses itself, but remains nevertheless a circle.
    Pearl S. Buck (1892–1973)