A fin is a surface used to produce lift and thrust or to steer while traveling in water, air, or other fluid media. The first use of the word was for the limbs of fish, but has been extended to include other animal limbs and man made devices. Lift consists of the sum of all the fluid dynamic forces on a body perpendicular to the direction of the external flow approaching that body. ... Thrust is a reaction force described quantitatively by Newtons Second and Third Law. ... A girl in a swimming pool full of water Water (from the Old English waeter; c. ... A subset of the phases of matter, fluids include liquids, gases, plasmas and, to some extent, plastic solids. ... Atlantic herring, Clupea harengus: the most abundant species of fish in the world. ...

The foremost use of fins is to ensure the directional stability of an object moving through a fluid such as water or air and may be seen in the use of fletching on arrows and fins at the rear of some missiles, rockets, self-propelled torpedoes, and kinetic energy penetrators. Fletching is the ancient art of creating arrows from materials such as wood and feathers. ... Japanese arrow (ya) and head // Weapon An arrow is a pointed projectile that is shot with a bow. ... A missile (CE pronunciation: ; AmE: ) is, in general, a projectile—that is, something thrown or otherwise propelled. ... A Redstone rocket, part of the Mercury program A rocket is a vehicle, missile or aircraft which obtains thrust by the reaction to the ejection of fast moving exhaust gas from within a rocket engine. ... A torpedo in Rail terminology refers to a small explosive device strapped to the top of the rail to alert an approaching train of immediate danger ahead. ... A kinetic energy penetrator, long-rod penetrator, or APFSDS (Armour Piercing Fin Stabilized Discarding Sabot) is a type of ammunition which, like a bullet, does not contain explosives, but uses kinetic energy to penetrate the target. ...

Fins have also been used on automobiles of the late 1950's and early 1960's, promoted then as adding aerodynamic stability but now more realistically evaluated as a rather flamboyant style, particularly in American automobiles of this period. Car redirects here. ... Style may refer to genre, design, format, or appearance, including: Clothing: fashion Flower part: flower Music: music genre Sundial part: Gnomon Titles or honorifics: Style (manner of address) including Chinese courtesy names Web design: Cascading Style Sheets Writing: style guide and literary genre Linguistics: Variation in language use of an...

Moving fins may be used to propel an object through lateral thrust (see mechanics). Mechanics refers to: a craft relating to machinery (from the Latin mechanicus, from the Greek mechanikos, meaning one skilled in machines), or a range of disciplines in science and engineering. ...

Examples of fin use:

• Propellers usually have a number of fins that work to translate torquing force to lateral thrust, thus propelling a ship. These are also called blades. In the case of high power application it is important to avoid cavitation, caused by excessive negative pressure, as this can cause noise, a loss of power, and damage to the propeller.
• For scuba divers' fins, see swimfin.
• In surfing, a skeg is a stabilizing fin located at the rear of the surfboard. A skeg has the effect of keeping the board moving forward in a controlled manner.
• Constructions of the same purpose as fins (producing thrust, but working in gaseous media) instead are usually called wings or stabilizers with aerodynamics as the governing science. The exception to this is the vertical surface of an aircraft to which the rudder is attached - this is still usually called a fin but is (more formally) called a vertical stabilizer.

In the vernacular sense, "fin" was popularised in the late 90's by legendary Australian auteur and musician Jada White. The term was a reference to movies of the silent era, again popularised by the cult following of White's own film-making. It was used as an audible exclamation point to denote the end of conversation, argument or debate, where there could be no possible sane rebuttal. This article needs to be cleaned up to conform to a higher standard of quality. ... Italian ship-rigged vessel Amerigo Vespucci in New York Harbor, 1976 A ship is a large, sea-going watercraft, sometimes with multiple decks. ... Cavitating propeller model in a water tunnel experiment Cavitation is the phenomenon where small and largely empty cavities are generated in a fluid, which expand to large size and then rapidly collapse, producing a sharp sound. ... SCUBA is an acronym for Self-Contained Underwater Breathing Apparatus. ... A pair of Viper® swimfins. ... Surfing outside Kaneohe Bay, Hawai‘i. ... In surfing, a skeg is a stabilizing fin located at the rear of the surfboard. ... Surfboards were invented by the Hawaiians for riding breaking waves to the beach. ... A Laughing Gull on the beach in Atlantic City. ... The tail of a Lufthansa airliner (Airbus A319) in flight, showing the horizontal and vertical stabilizer Mathematics: see Group action. ... Aerodynamics is a branch of fluid dynamics concerned with the study of gas flows. ... The worlds oldest depiction of a rudder. ... The vertical stabilizer or fin of an aircraft is found on its tail, generally pointing straight upward. ...

For example in a conversation about greatest guitarists "Jimi Hendrix, FIN" would be approrpiate usage.