Word · CEFR B1 · Frequency #4613
diameter
直径
the length of a straight line through the center of a circle or sphere that connects two points on its outer edge; also such a line itself
- 1.
Any straight line between two points on the circumference of a circle that passes through the center of the circle; a chord that passes through the center of the circle.
直径
- 2.
the length of a straight line passing through the center of a circle and connecting two points on the circumference
通过圆心并连接圆周上两点的直线长度
- 3.
The length of such a line.
直径长度
- 4.
a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)
连接圆心与圆周上两点(或球体表面上两点)的直线
- 5.
The maximum distance between any two points in a metric space.
度量空间中的直径
- 6.
The maximum eccentricity over all vertices in a graph.
图的直径
度量空间的直径；图的直径；通过圆心并连接圆周上两点的直线长度；直径长度；连接圆心与圆周上两点(或球体表面上两点)的直线
In use
The diameter of the pipe is 10 centimeters.
To calculate the circumference, multiply the diameter by π.
The tree trunk had a diameter of over two meters.
the diameter of sth
Measure the diameter of the circle.
测量这个圆的直径。
number + in diameter
用于描述物体的直径尺寸。
The pipe is 5 cm in diameter.
这根管道直径为5厘米。
have a diameter of + number
The tree has a diameter of 2 meters.
这棵树的直径为2米。
Connections
Collocations
- outer diameter
- 外径
- The outer diameter of the pipe is 10 centimeters.管道的外径是10厘米。
- inner diameter
- 内径
- The inner diameter must be large enough for the cable to pass through.内径必须足够大以便电缆通过。
- diameter of a circle
- 圆的直径
- The diameter of a circle is twice its radius.圆的直径是半径的两倍。
- measure the diameter
- 测量直径
- Use a caliper to measure the diameter of the sphere.用卡尺测量球的直径。
- diameter of the Earth
- 地球直径
- The diameter of the Earth is about 12,742 kilometers.地球直径约为12,742公里。
Synonyms
Learner notes
Memory Tip
想象用尺子（meter）穿过（dia-）圆心，量出直径。
Context & Register
语域：formal 常见场景：mathematics、geometry、engineering 通常用于数学或科学语境。
Pronunciation & Spelling
Parameter rhymes with diameter: both stress the 'a' and end in /æmɪtə(r)/. Other -meter words like perimeter, thermometer, barometer have different stressed vowels (e.g., /ɪ/ in perimeter, /ɒ/ in thermometer/barometer) and do not rhyme. Centimeter and millimeter also have different stress patterns and do not rhyme.
Usage priority
Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.