noun
Aetosaurus is a genus of extinct reptiles that lived during the Triassic period.
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The aetosaurus is a type of prehistoric reptile known for its distinctive armor-like plates.
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I heard that the aetosaurus was one of the toughest dinosaurs around.
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Check out that cool aetosaurus toy I got from the store!
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Her personality was like an aetosaurus - tough on the outside but gentle on the inside.