Q

n. The fourth part; the quarter. (Geom.) The quarter of a circle, or of the circumference of a circle, an arc of 90°, or one subtending a right angle at the center. One of the quarters created by two intersecting roads or streets.

 - (Geom.) One of the four parts into which a plane is divided by the coordinate axes. In angular measures, a quadrant is equal to ninety degrees. The upper right-hand part is the first quadrant; the upper left-hand part the second; the lower left-hand part the third; and the lower right-hand part the fourth quadrant. An instrument ...