Rod vs. Cylinder — What's the Difference?

A fishing rod.

A cylinder (from Greek: κύλινδρος, romanized: kulindros, lit. 'roller', 'tumbler') has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. It is the idealized version of a solid physical tin can having lids on top and bottom.

A piston rod.

A solid geometrical figure with straight parallel sides and a circular or oval cross section.

An often expandable horizontal bar, especially of metal, used to suspend household items such as curtains or towels.

A piston chamber in a steam or internal combustion engine.

A leveling rod.

A cylinder-shaped container holding liquefied gas under pressure.

A lightning rod.

A rotating metal roller in a printing press.

A divining rod.

A cylinder seal.

A measuring stick.

The surface generated by a straight line intersecting and moving along a closed plane curve, the directrix, while remaining parallel to a fixed straight line that is not on or parallel to the plane of the directrix.

One of the horizontal elements in a truss system underneath a rail car, especially a freight car.

The portion of such a surface bounded by two parallel planes and the regions of the planes bounded by the surface.

A shoot or stem cut from or growing as part of a woody plant.

A solid bounded by two parallel planes and such a surface, especially such a surface having a circle as its directrix.

A stick or bundle of sticks or switches used to give punishment by whipping.

A cylindrical container or object.

Punishment; correction.

The chamber in which a piston of a reciprocating engine moves.

A scepter, staff, or wand symbolizing power or authority.

The chamber of a pump from which fluid is expelled by a piston.

Power or dominion, especially of a tyrannical nature

The rotating chamber of a revolver that holds the cartridges.

A linear measure equal to 5.5 yards or 16.5 feet (5.03 meters). Also called pole2.

Any of several rotating parts in a printing press, especially one that carries the paper.

The square of this measure, equal to 30.25 square yards or 272.25 square feet (25.30 square meters).

(Archaeology)A cylindrical stone or clay object with an engraved design or inscription.

(Anatomy) Any of various rod-shaped cells in the retina that respond to dim light. Also called rod cell.

(geometry) A surface created by projecting a closed two-dimensional curve along an axis intersecting the plane of the curve. Category:en:Surfaces

(Microbiology) An elongated bacterium; a bacillus.

(geometry) A solid figure bounded by a cylinder and two parallel planes intersecting the cylinder.

(Slang) A pistol or revolver.

Any object in the form of a circular cylinder.

Vulgar Slang A penis, especially when erect.

A cylindrical cavity or chamber in a mechanism, such as the counterpart to a piston found in a piston-driven engine.

A straight, round stick, shaft, bar, cane, or staff.

(automotive) The space in which a piston travels inside a reciprocating engine or pump.

A longitudinal pole used for forming part of a framework such as an awning or tent.

A container in the form of a cylinder with rounded ends for storing pressurized gas; a gas cylinder.

(fishing) A long slender usually tapering pole used for angling; fishing rod.

An early form of phonograph recording, made on a wax cylinder.

A stick, pole, or bundle of switches or twigs (such as a birch), used for personal defense or to administer corporal punishment by whipping.

The part of a revolver that contains chambers for the cartridges.

An implement resembling and/or supplanting a rod (particularly a cane) that is used for corporal punishment, and metonymically called the rod, regardless of its actual shape and composition.

(computing) The corresponding tracks on a vertical arrangement of disks in a disk drive considered as a unit of data capacity.

A stick used to measure distance, by using its established length or task-specific temporary marks along its length, or by dint of specific graduated marks.

(transitive) To calender; to press (paper, etc.) between rollers to make it glossy.

(archaic) A unit of length equal to 1 pole, a perch, 4 chain, 2 yards, 2 feet, or exactly 5.0292 meters (these being all equivalent).

A solid body which may be generated by the rotation of a parallelogram round one its sides; or a body of rollerlike form, of which the longitudinal section is oblong, and the cross section is circular.

An implement held vertically and viewed through an optical surveying instrument such as a transit, used to measure distance in land surveying and construction layout; an engineer's rod, surveyor's rod, surveying rod, leveling rod, ranging rod. The modern (US) engineer's or surveyor's rod commonly is eight or ten feet long and often designed to extend higher. In former times a surveyor's rod often was a single wooden pole or composed of multiple sectioned and socketed pieces, and besides serving as a sighting target was used to measure distance on the ground horizontally, hence for convenience was of one rod or pole in length, that is, 2 yards.

Any hollow body of cylindrical form

(archaic) A unit of area equal to a square rod, 4 square yards or 160 acre.

The revolving square prism carrying the cards in a Jacquard loom.

A straight bar that unites moving parts of a machine, for holding parts together as a connecting rod or for transferring power as a driveshaft.

A cylindrical container for oxygen or compressed air

(anatomy) A rod cell: a rod-shaped cell in the eye that is sensitive to light.

A solid bounded by a cylindrical surface and two parallel planes (the bases)

(biology) Any of a number of long, slender microorganisms.

A surface generated by rotating a parallel line around a fixed line

(chemistry) A stirring rod: a glass rod, typically about 6 inches to 1 foot long and 8 to 4 inch in diameter that can be used to stir liquids in flasks or beakers.

A chamber within which piston moves

(slang) A pistol; a gun.

A penis.

(slang) A hot rod, an automobile or other passenger motor vehicle modified to run faster and often with exterior cosmetic alterations, especially one based originally on a pre-1940s model or (currently) denoting any older vehicle thus modified.

(ufology) A rod-shaped object that appears in photographs or videos traveling at high speed, not seen by the person recording the event, often associated with extraterrestrial entities.

(mathematics) A Cuisenaire rod.

(rail transport) A coupling rod or connecting rod, which links the driving wheels of a steam locomotive, and some diesel shunters and early electric locomotives.

(construction) To reinforce concrete with metal rods.

(transitive) To furnish with rods, especially lightning rods.

To penetrate sexually.

(slang) To hot rod.

A straight and slender stick; a wand; hence, any slender bar, as of wood or metal (applied to various purposes).

A kind of sceptor, or badge of office; hence, figuratively, power; authority; tyranny; oppression.

A measure of length containing sixteen and a half feet; - called also perch, and pole.

A linear measure of 16.5 feet

A long thin implement made of metal or wood

Any rod-shaped bacterium

A square rod of land

Visual receptor cell sensitive to dim light

A gangster's pistol