tail fin

Definition of Tail Fin in English :

a stabilizer that is part of the vertical tail structure of an airplane

2. fin, tail fin, tailfin

one of a pair of decorations projecting above the rear fenders of an automobile

3. caudal fin, tail fin

the tail of fishes and some other aquatic vertebrates

WordNet Lexical Database for English. Princeton University. 2010.

Tail Fin

noun

1.

a fixed or adjustable fin on the rear of a rocket, car, etc.

: sometimes written ˈtailˌfin noun

2. Zoology

a movable fin that forms the tail of a fish, the fluke of a whale, etc.

n.

1. A fin at the posterior part of the body of a fish, crustacean, whale, or other aquatic animal.

2. An ornamental projection shaped like a fin on the rear fender of an automobile. Also called fin¹.

3. A fin at the tail end of an aerodynamic or hydrodynamic object such as an airplane or surfboard, used to provide directional control or stability.