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anal fin

noun

the median, unpaired fin on the ventral margin between the anus and the caudal fin in fishes.

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Nearby words

anal canal, anal character, anal column, anal duct, anal erotic, anal fin, anal fissure, anal fistula, anal intercourse, anal orifice, anal pecten
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for anal fin

anal fin

noun

a median ventral unpaired fin, situated between the anus and the tail fin in fishes, that helps to maintain stable equilibrium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012