DuckCorp Dico

Found one definition

1.                 From English-日本語 (にほんご) FreeDict+WikDict dictionary ver. 2022.11.18:
                   
   
   
                   
                     
   fin //fɪn// <n>
   1. 鰭
   appendage of a fish
   2. フィン
   device used by divers