Plural of ankylosaur; a group of plant-eating dinosaurs with heavily armored bodies, fused spinal bones, and club-like tails.
From Greek 'ankylos' (stiff) + 'sauros' (lizard), pluralized. These dinosaurs lived from the Early Jurassic through the Late Cretaceous period and included famous species like Ankylosaurus and Triceratops relatives.
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