tail fin

/ˌteɪl ˈfɪn/

Other forms: tail fins

Definitions of tail fin

1. noun

   a stabilizer that is part of the vertical tail structure of an airplane
   synonyms: tailfin, vertical fin, vertical stabiliser, vertical stabilizer

   type of:

   stabilizer

   airfoil consisting of a device for stabilizing an aircraft
2. noun

   one of a pair of decorations projecting above the rear fenders of an automobile
   synonyms: fin, tailfin

   type of:

   decoration, ornament, ornamentation

   something used to beautify
3. noun

   the tail of fishes and some other aquatic vertebrates
   synonyms: caudal fin

   types:

   heterocercal fin

   a tail fin with unequal lobes in which the vertebral column turns upward into the larger lobe as in sharks

   homocercal fin

   symmetrical tail fin extending beyond the end of the vertebral column as in most bony fishes

   type of:

   fin

   organ of locomotion and balance in fishes and some other aquatic animals