Great Britain, UK, United Kingdom, United Kingdom of Great Britain and Northern Ireland, Britain, GB - a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland

linear unit - a unit of measurement of length

yard, pace - a unit of length equal to 3 feet; defined as 91.44 centimeters; originally taken to be the average length of a stride

furlong - a unit of length equal to 220 yards

baton - a thin tapered rod used by a conductor to direct an orchestra

connecting rod - a rod that transmits motion (especially one that connects a rotating wheel to a reciprocating shaft)

control rod - a steel or aluminum rod that can be moved up or down to control the rate of the nuclear reaction

fishing pole, fishing rod - a rod of wood or steel or fiberglass that is used in fishing to extend the fishing line

implement - instrumentation (a piece of equipment or tool) used to effect an end

pole - a long (usually round) rod of wood or metal or plastic

ramrod - a rod used to ram the charge into a muzzle-loading firearm

ramrod - a rod used to clean the barrel of a firearm

rotating shaft, shaft - a revolving rod that transmits power or motion

shaft - a long rod or pole (especially the handle of an implement or the body of a weapon like a spear or arrow)

stair-rod - a rod that holds a stair-carpet in the angle between two steps

tie rod - either of two rods that link the steering gear to the front wheels

bacteria, bacterium - (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered plants

streptobacillus - any of various rod-shaped gram-negative bacteria

area unit, square measure - a system of units used to measure areas

retina - the light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve

visual cell - one of the cells of the retina that is sensitive to light

retinal purple, rhodopsin, visual purple - a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light

handgun, pistol, shooting iron, side arm - a firearm that is held and fired with one hand

jargon, lingo, patois, argot, vernacular, slang, cant - a characteristic language of a particular group (as among thieves); "they don't speak our lingo"