Etymology

ankylosaur

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Today it means: Synonym of ankylosaurus, Ankylosaurus magniventris, a herbivorous dinosaur of the Cretaceous period notable for its heavy armor and clublike tail. Full definition →

First used 1908
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The story

Clipping of ankylosaurus, q.v.

First known use, by meaning

  • 1908 Synonym of ankylosaurian, any member of the suborder Ankylosauria, herbivorous dinosaurs notable for their armor in the form of bony osteoderms.

Etymology from Wiktionary, CC BY-SA 4.0.