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

plural of fit rod

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.

plural of tie rod

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

plural of rod pod

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