diameter
//daɪˈæm.ɪ.tər//
Noun
diameterSingular
diametersPlural
1
A straight line passing through the center of a circle or sphere, connecting two points on the circumference.
The diameter of this circle is 10 centimeters.
2
The length of such a line; the width or thickness of something circular or spherical.
The pipe has a diameter of 10 centimeters.