Quadrant

1.

(an quarter of a circle or of its circumference; an arc of 90 degrees a quarter section of a circle; in gunnery an instrument to make the degrees of a gun's elevation) ចតុភាគមណ្ឌល

1.

The fourth part; the quarter.

2.

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.

3.

One of the four parts into which a plane is divided by the coordinate axes. 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.

4.

An instrument for measuring altitudes, variously constructed and mounted for different specific uses in astronomy, surveying, gunnery, etc., consisting commonly of a graduated arc of 90, with an index or vernier, and either plain or telescopic sights, and usually having a plumb line or spirit level for fixing the vertical or horizontal direction.