tailfin

About 0.01 uses per million words.

Meaning

1. noun A fin at the tail of a fish, caudal fin
2. noun A fin on the tail of an aircraft, vertical stabilizer
3. noun A fin-like projection at the rear of a car, common on American cars of the 1950s.

Similar words

tail fin fin vertical stabilizer vertical fin caudal fin backfin tail dorsal fin sailfin finlet

Often followed by

of and is was in on to