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tail fan

noun Zoology.
  1. the fanlike posterior appendage of crayfish and lobsters, consisting of a telson and two uropods, used for rapid backward propulsion.
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Origin of tail fan

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for tail fan

Historical Examples of tail fan

  • The uropods are generally very small, and do not form a tail-fan.

    The Life of Crustacea

    William Thomas Calman

  • The uropods no longer form a tail-fan, but are adapted for firmly wedging the hind part of the body into the coils of the shell.

    The Life of Crustacea

    William Thomas Calman

  • T, telson, having the uropods or appendages of the last abdominal somite spread out on either side of it, forming the “tail-fan.”


British Dictionary definitions for tail fan

tail fan

noun
  1. the fanned structure at the hind end of a lobster or related crustacean, formed from the telson and uropods
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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