Quadrant Definition

kwŏdrənt
quadrants
noun
quadrants
A fourth part of the circumference of a circle; an arc of 90°
Webster's New World
A quarter section of a circle.
Webster's New World
Any of the four areas into which a plane is divided by the reference axes in a Cartesian coordinate system, designated first, second, third, and fourth, counting counterclockwise from the area in which both coordinates are positive.
American Heritage
Any piece or part shaped like a quarter section of a circle.
Webster's New World
Any of the four parts formed by rectangular coordinate axes on a plane surface.
Webster's New World
Synonyms:
  • quarter-circle

Other Word Forms of Quadrant

Noun

Singular:
quadrant
Plural:
quadrants

Origin of Quadrant

  • Middle English quarter of a day from Latin quadrāns quadrant- a fourth part kwetwer- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin quadrantem, accusative singular of quadrāns (“fourth part of something, quarter”).

    From Wiktionary

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