Look up rail in Wiktionary, the free dictionary. Rail or rails may refer to: Railway transportation A generic term for railroads, railways, rail transport, and related matters Rail tracks, or railway lines, the running surface of a railway Rail profile, the cross sectional shape of a railway rail Third rail, a method of providing electric power to a railway train Conductor rail, a structural steel surface fitted alongside a rail track to provide electrical power to the train Science, technology, biology, and medicine Picatinny rail, a bracket used on some firearms in order to provide a standardized mounting platform for telescopic sights and other accessories Rails or Rallidae, a family of birds which includes crakes, coots, and gallinules Railing, a slang term for insufflation (medicine), whereby a substance, such as cocaine, is inhaled for recreational effects Structural Guard rail, for protective separation of persons (including those in vehicles) from dangerous places or situations Hand rail, for physical support, such as on stairways and steps Theatre rail, see batten (theater), from which lighting fixtures, theatrical scenery, tabs or curtains may be hung Curtain rail, see curtain, from which curtains are hung Door rails, see frame and panel, a horizontal outside member on a door or in a frame and panel construction Electrical engineering Power supply rail or voltage rail, a single voltage provided by a power supply unit Internal combustion engines Common rail, a fuel injection supply system Other users Crayon Rails, the generic term for a board game which recreates the building of railroads via the use of crayons Rail (1967 short film), made by Geoffrey Jones for British Transport Films An archaic term for sexual intercoursecitation needed Ruby on Rails, often shortened to "Rails" or "RoR", is an open source web application framework for the Ruby programming language RAIL (magazine), a magazine on the subject of current rail transport in the United Kingdom Rural Appalachian Improvement League (RAIL), a non-profit corporation based in Mullens, West Virginia, USA See also Railway (disambiguation) This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.