A long zirconium tube, filled with pellets of uranium oxide, stacked in bundles inside a nuclear reactor as fuel.

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

(now historical) A divining rod.

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

(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

Alternative spelling of flyrod

(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.

(fishing) A stand for holding various items of angling equipment while it is in use.