Diameter

[Sarah]

The distance through the lower part of the shaft of a column,used as a standard measure for all parts of the order. See Module.Conjugate diameters. See under Conjugate.

[Sarah]

a person's middle, torso etc.

[Magaret]

Diameter in In-line skating. The size of the skate wheels, measured in millimeters.

[Tina]

A straight line passing from side to side through the center of a body or figure, especially a circle or sphere.

[PussyCat]

(the length of) a straight line that reaches from one point on the edge of a round shape or object, through its centre, to a point on the opposite edge: