tel·​son | \ ˈtel-sən How to pronounce telson (audio) \

Definition of telson

: the terminal segment of the body of an arthropod or segmented worm especially : that of a crustacean forming the middle lobe of the tail

Examples of telson in a Sentence

Recent Examples on the Web It's also got something that looks like a tail but is actually called a telson — used to flip over the body, which can weigh 10 pounds. Carol Motsinger, USA TODAY, "Horseshoe crabs have a vital role in the development of a coronavirus vaccine. Here's why.," 22 Sep. 2020 Uraraneida have more primitive spinnerets and retain the telson that modern day spiders no longer have. John Wenz, Popular Mechanics, "Horrifying Fossil Shows Spider With a Scorpion Tail," 5 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'telson.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of telson

1855, in the meaning defined above

History and Etymology for telson

New Latin, from Greek, end of a plowed field; perhaps akin to Greek telos end

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Time Traveler for telson

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The first known use of telson was in 1855

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Cite this Entry

“Telson.” Dictionary, Merriam-Webster, Accessed 4 Dec. 2020.

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tel·​son | \ ˈtel-sən How to pronounce telson (audio) \

Medical Definition of telson

: the terminal segment of the body of an arthropod or segmented worm

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