fin 
/ˈfɪn/ noun
plural fins /ˈfɪn/ noun [count] 1 : a thin flat part that sticks out from the body of a fish and is used in moving or guiding the fish through water
▪ a fish with blue scales and spiny fins ▪ a shark fin 2 : a part on a machine (such as a car or airplane) that is shaped like a fish's fin
▪ a car from the 1950s with fins on the back — see also tail fin
▪ a fish with blue scales and spiny fins ▪ a shark fin
▪ a car from the 1950s with fins on the back — see also tail fin
— finned /ˈfɪnd/ adjective
▪ a finned creature [=a fish]
/ˈfɪnd/ adjective ▪ a finned creature [=a fish]
