noun
fin
FIN/fɪn/
A flat projecting part used to propel or steady an aquatic animal.
The fish uses its fins to stay balanced as it swims.
Etymology
Old English finn already named the fish’s body part. Its deeper ancestry is uncertain, though a connection with Latin pinna, “feather” or “wing,” has been suggested.
In context
for the Cuttlefish typically the Cuttlefish we're familiar with have fins limited to a specific body region in contrast this cuttlefish boasts fins that span its entire body this fin Arrangement enables them to Glide gracefully through the water
More examples
- The shark's dorsal fin breaks the surface.
- The goldfish fans its tail fin to move forward.
- Small fins near the fish's head help it steer.
Forms
fin · fins
finned adjective — Having one or more fins.
Similar words
- flipper
- A broad, flattened limb, especially on whales, seals, or turtles.