quadrant
- n. 象限；[海洋][天] 象限仪；四分之一圆
英英释意
- 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