Noah Webster's Dictionary 1. (n.) Any right line passing through the center of a figure or body, as a circle, conic section, sphere, cube, etc., and terminated by the opposite boundaries; a straight line which bisects a system of parallel chords drawn in a curve. 2. (n.) A diametral plane. 3. (n.) The length of a straight line through the center of an object from side to side; width; thickness; as, the diameter of a tree or rock. 4. (n.) 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.

Multi-Version Concordance Diameter (1 Occurrence) 1 Kings 7:32 The four wheels were underneath the panels; and the axles of the wheels were in the base: and the height of a wheel was a cubit and half a cubit. (See NIV)