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| pe·ly·co·saur [ péllikə sàwr ] (plural pe·ly·co·saurs) |
noun |
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| Definition: |
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large extinct reptile: a large extinct reptile that was common in Europe and North America during the Permian period, 245 to 290 million years ago. Order Pelycosauria.
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| [Mid-20th century. < Greek peluk- "bowl" + sauros "lizard"] |
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