diameter
noun /daɪˈæmɪtə(r)/
/daɪˈæmɪtər/
- enlarge imagea straight line going from one side of a circle or any other round object to the other side, passing through the centre
直径；对径 - The diameter of the tree trunk was more than a metre.
树干的直径超过一米。 - in diameter The dome is 42.3 metres in diameter.
这个穹顶直径为 42.3 米。
Topics Colours and Shapesc1, Maths and measurementc1- The mirror is 25cm in diameter.
镜子的直径是25 厘米。 - The tubes have an internal diameter of 2 mm.
管子的内径是 2 毫米。 - a method of calculating the diameter of the earth
计算地球直径的一种方法 - The radius of a circle is half its diameter.
圆的半径是直径的一半。
Collocations Dictionaryadjective- inner
- inside
- internal
- …
- calculate
- determine
- estimate
- …
- in diameter
- The diameter of the tree trunk was more than a metre.
- (specialist) a measurement of the power of an instrument to magnify something
放大率；放大倍数 - a lens magnifying 300 diameters (= making something look 300 times larger than it really is)
放大 300 倍的透镜
- a lens magnifying 300 diameters (= making something look 300 times larger than it really is)
词源late Middle English: from Old French diametre, via Latin from Greek diametros (grammē) ‘(line) measuring across’, from dia ‘across’ + metron ‘measure’.