tail fin
Plural
tail fins
1
the posterior part of a fish or aquatic animal's body, composed of fins that provide propulsion and maneuverability
- The tail fin of a dolphin is adapted for powerful swimming and diving.
- Fish use their tail fins to propel themselves through the water.
- The shape and size of a shark's tail fin contribute to its swimming speed.
- Tuna are known for their streamlined bodies and crescent-shaped tail fins.
- Marine biologists study the anatomy of tail fins to understand how different species navigate underwater.
Synonyms:
2
a stabilizer that is part of the vertical tail structure of an airplane