dorsal fin


noun
  1. the fin or finlike integumentary expansion generally developed on the back of aquatic vertebrates.

Origin of dorsal fin

1
First recorded in 1760–70

Words Nearby dorsal fin

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use dorsal fin in a sentence

  • The dorsal fin runs along the whole length of the back, and each pelvic has one spine and two soft rays.

    The Sea Shore | William S. Furneaux

British Dictionary definitions for dorsal fin

dorsal fin

noun
  1. any unpaired median fin on the backs of fishes and some other aquatic vertebrates: maintains balance during locomotion

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