Thagomizer

Rarity: Common

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At a glance

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Notion

Domain

Science and technology

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What Wikipedia says

A thagomizer () is the distinctive arrangement of spike-shaped osteoderms on the tails of some stegosaurian dinosaurs. These spikes are believed to have been a defensive measure against predators.

Excerpt from the Wikipedia article “Thagomizer”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Kevmin, CC BY-SA 4.0, via Wikimedia Commons.