B1nounscienceacademic
US/daɪˈæm.ə.tər/
UK/daɪˈæm.ɪ.tə/
the length of a straight line through the middle of a circle, from one side to the other
In context
The pizza has a diameter of 30 centimeters, enough for two people.
Measure the diameter of the pipe before you buy a new one.
The tree's trunk is almost two meters in diameter.
Words that go with diameter
noun + preposition
- in diameterThe crater is about one kilometer in diameter.
- diameter ofThe diameter of the wheel is 60 centimeters.
verb + noun
- measure the diameterUse a ruler to measure the diameter of the coin.
adjective + noun
- small diameterCables with a small diameter are easier to hide.
- inner diameterThe inner diameter of the tube is very small.