Definition of quadrant:

part of speech: noun

In geom., the quarter of a circle; an arc of 90°; in nav. and astron., an instr. for taking elevations, adapted for measuring an arc of not more than 90°.

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A small bunch of grass, straw, or hair, and the like, used as a brush; a quick sweeping motion; a bundle of peeled twigs used for rapidly agitating or whisking such articles as cream, eggs, & c. ...