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Definition of Quadrant
1. Noun. A quarter of the circumference of a circle.
2. Noun. Any of the four areas into which a plane is divided by two orthogonal coordinate axes.
3. Noun. The area enclosed by two perpendicular radii of a circle.
4. Noun. A measuring instrument for measuring altitude of heavenly bodies.
Definition of Quadrant
1. n. The fourth part; the quarter.
Definition of Quadrant
1. a quarter section of a circle [n -S]
Medical Definition of Quadrant
1.