(geometry) Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle. / (geometry) The length of such a line.

plural of diameter

The outermost or largest diameter of something that has multiple circular, cylindrical, or helical features (e.g. a screw or gear)

The innermost diameter of a cylindrical, circular, or helical feature, such as a screw thread, gear teeth, etc.

The diameter of the inside of a tube, pipe or any other object.

Alternative form of inner diameter

Alternative form of inner diameter

plural of inner diameter

plural of inside diameter

plural of internal diameter