Topic: MATHS
| Date: | 1300-1400 |
| Language: | Old French |
| Origin: | diametre, from Greek diametros 'measure across', from metron 'measure' |
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di‧am‧e‧ter
[countable]
[countable]HMHM a straight line from one side of a circle to the other side, passing through the centre of the circle, or the length of this line
