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The Far Side comic (1982 May 28) which coined the term.
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Alternative forms[edit]


Coined by cartoonist Gary Larson in 1982. His comic strip (image on the right) shows a caveman giving a lecture illustrating this part of a dinosaur, with the caption "Now this end is called the thagomizer... after the late Thag Simmons". See -ize, -er.


  • IPA(key): /ˈθæɡ.ə.maɪ.zɚ/
  • (file)


thagomizer (plural thagomizers)

  1. An arrangement of spikes found on the tails of various stegosaurs.
    • 2001, Thomas R. Holtz with Terry Riley, The Little Giant Book of Dinosaurs, page 54:
      Like the thagomizer of the stegosaur, the ankylosaurid tail club was probably used to smash into attackers.
    • 2008 August 1, Gary Jeffrey, Stegosaurus: The Plated Dinosaur, Rosen Publishing Group, →ISBN, →LCCN, →OCLC, →OL, page 30:
      An Allosaurus backbone had a hole in which a Stegosaurus thagomizer fitted perfectly. Over the years, many of the fossil thagomizers that have been dug up have had broken tips.
    • 2008 September 17, L. E. Simmons, The Lady of Gold (SnapDragon Adventures 1), 1st edition,, →ISBN, →LCCN, page 135:
      "Not like that," Snap growled, raising her four fists, swishing her thagomizer around threateningly.


For more quotations using this term, see Citations:thagomizer.