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fin

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fin/ˈfɪn/noun
pluralfins
fin
/ˈfɪn/
noun
pluralfins
Learner's definition of FIN  
[count]
: 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 part on a machine (such as a car or airplane) that is shaped like a fish's fin
— see also tail fin

— finned

/ˈfɪnd/adjective
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