n.
1.a quarter of the circumference of a circle
2.a quarter of the circumference of a circle
3.any of the four areas into which a plane is divided by two orthogonal coordinate axes
4.the area enclosed by two perpendicular radii of a circle
5.a measuring instrument for measuring altitude of heavenly bodies
Idiom of the Day
hit a plateau
to reach a certain level of activity or sales and then stop
The performance of the basketball team hit a plateau and then began to decline.