In geometry, a rod is a 3-dimensional, solid (filled) cylinder. Geometry (Greek γεÏμεÏÏία; geo = earth, metria = measure) arose as the field of knowledge dealing with spatial relationships. ... 2-dimensional renderings (ie. ... In jewelry, a solid gold piece is the alternative to gold-filled or gold-plated jewelry. ... A right circular cylinder In mathematics, a cylinder is a quadric, i. ...
Switch (rod), a long, straight piece of wood, either in the natural state (stem, branch or twig) or finished, as used as a staff (attribute and/or walking aid) or for corporal punishment, or a bundle of such switches
Rod cell is found in the retina and is sensitive to light/dark (fl/white)
Rod (cryptozoology), a species of creature that flits about in the air at such a high speed as to not be seen by the naked eye, but which can be caught on video
Ackermann steering geometry is a geometric arrangement of linkages in the steering of a car or other vehicle designed to solve the problem of wheels on the inside and outside of a turn needing to trace out circles of different radii.
The Ackermann steering geometry arranges this automatically by moving the steering pivot points inward so as to lie on a line drawn between the steering kingpins and the centre of the rear axle.
The steering pivot points are joined by a rigid bar, the tie rod, which can also be part of the, for example, rack and pinion steering mechanism.