di‧am‧e‧ter /daɪˈæmətə, daɪˈæmɪtə $ -ər/
noun [countable][
Date: 1300-1400;
Language: Old French;
Origin: diametre, from Greek diametros 'measure across', from metron 'measure']
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
3 inches/1 metre etc in diameter
Draw a circle six centimetres in diameter.diameter of The diameter of the Earth is about 13,000 km. [TahlilGaran] Dictionary of Contemporary English ▲