noun

diameter

diameter

The circle has a diameter of 10 centimetres.

The circle has a diameter of 10 centimeters.

Measure the diameter of the pipe.

Measure the diameter of the pipe.

((of sth.)) the diameter of something Measure the diameter of the pipe.

((number)) ((unit)) in diameter having a particular diameter The pipe is 5 cm in diameter.

Synonyms: width, breadth, span

From Greek 'dia-' (across, through) and 'metron' (measure), meaning 'a measure across'.

'Dia-' means 'across' and 'meter' means 'measure'. It's the measure across a circle.

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