n.
- a flattened appendage on the body of a fish or other aquatic animal, used for propelling, steering, and balancing.
▸an underwater swimmer's flipper.
- a small flattened projecting surface or attachment on an aircraft, rocket, or car, for providing aerodynamic stability.
- a flattened projection for increasing heat transfer from an object.
v.
(fins, finning, finned)
swim under water by means of flippers.
Derivative
Etymology
OE finn, fin, of Gmc origin.