QUADRANT

Quadrant

A quadrant is an instrument that is used to measure angles up to 90°. It was originally proposed by Ptolemy as a better kind of astrolabe. Several different variations of the instrument were later produced by medieval Muslim astronomers.

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quadrant

Noun

  1. One of the four sections made by dividing an area with two perpendicular lines.
  2. The four regions of the Cartesian plane bounded by the x-axis and y-axis.
  3. One fourth of a circle or disc; a sector with an angle of 90°.
  4. A measuring device with a graduated arc of 90° used in locating an altitude.


The above text is a snippet from Wiktionary: quadrant
and as such is available under the Creative Commons Attribution/Share-Alike License.

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