| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024di•am•e•ter /daɪˈæmɪtɚ/USA pronunciation n. - Mathematics[countable] a straight line passing through the center of a figure, esp. one passing through the center of a circle or sphere.
- Mathematicsthe length of such a line: [countable]What is the diameter of the earth?[uncountable* often: in + ~]It is 25,000 miles in diameter.
See -meter-. WordReference Random House Unabridged Dictionary of American English © 2024di•am•e•ter (dī am′i tər),USA pronunciation n. - Mathematics[Geom.]
- a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end.
- a straight line passing from side to side of any figure or body, through its center.
- Mathematicsthe length of such a line.
- Mathematicsthe width of a circular or cylindrical object.
- Greek diámetros diagonal, diameter, equivalent. to dia- dia- + -metros, derivative of métron meter1
- Latin diametros
- Old French
- Middle English diametre 1350–1400
Collins Concise English Dictionary © HarperCollins Publishers:: diameter /daɪˈæmɪtə/ n - a straight line connecting the centre of a geometric figure, esp a circle or sphere, with two points on the perimeter or surface
- the length of such a line
- the thickness of something, esp with circular cross section
Etymology: 14th Century: from Medieval Latin diametrus, variant of Latin diametros, from Greek: diameter, diagonal, from dia- + metron measure |