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BNC: 17036 COCA: 15633

quadrant

noun
/ˈkwɒdrənt/
/ˈkwɑːdrənt/
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  1. (geometry几何) a quarter of a circle or of its circumference (= the distance around it)四分之一圆(或圆周);象限
  2. 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)
  3. Word Originlate Middle English (denoting the astronomical instrument): from Latin quadrans, quadrant- ‘quarter’, from quattuor ‘four’.

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