A graduated staff, typically having alternate black and white sections, used (along with a theodolite) in surveying

A rod or metal tube fixed to the wall of a room, used for hanging pictures.

(now historical) A divining rod.

(informal) Francisco Rodríguez (baseball player)

(medicine) clumps of azurophilic granular material that typically form elongated needles seen in the cytoplasm of myeloid leukemic blast cells.

(shipbuilding) A gauge rod used to try the depth of a bolt hole in order to determine the length of bolt required.

A rod attached to the beam for working the valves, as in the Cornish engine.

(dated) lightning rod

(acoustics) Either of a pair of flexible rods whose periods of vibration in two planes at right angles are in some exact ratio to one another. When one end of such a rod is fixed, the free end describes through vibration the corresponding Lissajous figure.

(historical) An old unit of length, equal to 12.36 feet (377.7 cm).