| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024quad•rant /ˈkwɑdrənt/USA pronunciation n. [countable]- Mathematicsa quarter of a circle;
an arc of 90°. - Mechanical Engineeringsomething shaped like a quarter of a circle, such as a part of a machine.
- Astronomy, Surveyingan instrument used in astronomy, navigation, etc., for measuring heights and angles.
See -quad-. WordReference Random House Unabridged Dictionary of American English © 2024quad•rant (kwod′rənt),USA pronunciation n. - Mathematicsa quarter of a circle; an arc of 90°.
- Mathematicsthe area included between such an arc and two radii drawn one to each extremity.
- Mechanical Engineeringsomething shaped like a quarter of a circle, as a part of a machine.
- Mathematics, Astronomy, Astronomy[Geom., Astron.]one of the four parts into which a plane, as the face of a heavenly body, is divided by two perpendicular lines, numbered counterclockwise from upper right:the first quadrant of the moon.
- Astronomy, Surveyingan instrument, usually containing a graduated arc of 90°, used in astronomy, navigation, etc., for measuring altitudes.
- Astrologyone of the four quarters of the horoscope: determined by the ascendant, nadir, descendant, and midheaven and numbered counterclockwise from the ascendant.
- Furnitureone of two metal sliding pieces, of quadrant form, used to support the fall front of a desk from above.
- Latin quadrant- (stem of quadrāns) fourth part
- Middle English 1350–1400
Collins Concise English Dictionary © HarperCollins Publishers:: quadrant /ˈkwɒdrənt/ n - a quarter of the circumference of a circle
- the area enclosed by two perpendicular radii of a circle and its circumference
- any of the four sections into which a plane is divided by two coordinate axes
- a piece of a mechanism in the form of a quarter circle, esp one used as a cam or a gear sector
- an instrument formerly used in astronomy and navigation for measuring the altitudes of stars, consisting of a graduated arc of 90° and a sighting mechanism attached to a movable arm
Etymology: 14th Century: from Latin quadrāns a quarterquadrantal /kwɒˈdræntəl/ adj |