quadrant
noun /ˈkwɒdrənt/
/ˈkwɑːdrənt/
- enlarge image(geometry
) a quarter of a circle or of its circumference (= the distance around it)几何 四分之一圆(或圆周);象限 - an instrument for measuring angles, especially to check your position at sea or to look at stars
象限仪,四分仪(常用于测量海上方位或观看星辰)
词源late Middle English (denoting the astronomical instrument): from Latin quadrans, quadrant- ‘quarter’, from quattuor ‘four’.