fins
word · lemma: fin
Definition
Fins are thin, flat parts on the bodies of fish and some sea animals that help them swim. The word can also refer to similar parts on airplanes, rockets, or surfboards used for balance or steering.
Usage & Nuances
Mainly used for fish and sea animals; can also refer to 'tail fins' or 'side fins' on vehicles or boards. Not to be confused with 'flippers' (used for human swimming); 'fins' is the natural body part or engineered component for steering/control.
Example Sentences
The shark's fins can be seen above the water.
basic
Dolphins have strong fins to help them swim fast.
basic
The surfboard’s fins help it stay straight on the wave.
natural
I accidentally broke one of the fins on my model airplane.
natural
Sea turtles move gracefully with their large fins.
natural
Fish use their fins to swim and turn easily in the water.
basic