■ noun
1》 a flattened appendage on the body of a fish or other aquatic animal, used for propelling, steering, and balancing.
↘an underwater swimmer's flipper.
2》 a small flattened projecting surface or attachment on an aircraft, rocket, or car, for providing aerodynamic stability.
3》 a flattened projection for increasing heat transfer from an object.
■ verb ( ~s , ~ning , ~ned ) swim under water by means of flippers.
Derivatives
~less adjective
~ned adjective
Origin
OE ~n , ~ , of Gmc origin.