|a. a quarter of the circumference of a circle|
|b. the area enclosed by two perpendicular radii of a circle and its circumference|
|c. any of the four sections into which a plane is divided by two coordinate axes|
|2.||a piece of a mechanism in the form of a quarter circle, esp one used as a cam or a gear sector|
|3.||an instrument formerly used in astronomy and navigation for measuring the altitudes of stars, consisting of a graduated arc of 90° and a sighting mechanism attached to a movable arm|
|[C14: from Latin quadrāns a quarter]|
quadrant quad·rant (kwŏd'rənt)
A circular arc of 90 degrees; one fourth of the circumference of a circle.
A quarter portion of any roughly circular anatomical area such as the abdomen, measuring along imaginary axes at right angles to each other.
|quadrant (kwŏd'rənt) Pronunciation Key