ODE→tail fin

tail fin

EnglishOxford Dictionary of English

tail fin

▸ noun

1 Zoology a fin at the posterior extremity of a fish's body, typically continuous with the tail. Also called caudal fin

2 Aeronautics a projecting vertical surface on the tail of an aircraft, providing stability and typically housing the rudder.

3 an upswept projection on each rear corner of a car, popular in the 1950s.

tail fin — ODE · Shobdo