Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun diameter

2 senses of diameter

Sense 1
diameter, diam -- (the length of a straight line passing through the center of a circle and connecting two points on the circumference)
       => length -- (the linear extent in space from one end to the other; the longest dimension of something that is fixed in place; "the length of the table was 5 feet")

Sense 2
diameter -- (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))
       => straight line -- (a line traced by a point traveling in a constant direction; a line of zero curvature; "the shortest distance between two points is a straight line")