noun
a term coined by cartoonist Gary Larson in a 1982 Far Side comic strip to refer to the distinctive arrangement of four to ten spikes on the tails of stegosaurid dinosaurs
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The paleontologist pointed out the thagomizer on the fossilized stegosaurus tail.
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Check out the spikes on the end of that stegosaurus tail, also known as a thagomizer.
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The thagomizer on that dino's tail looks pretty gnarly.
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Her wit was like a thagomizer, sharp and piercing in its impact.