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Dictionary

pel•y•co•saur

Pronunciation: (pel'i-ku-sôr"), [key]
—n.
any of a group of large primitive reptiles belonging to the extinct order Pelycosauria, abundant in North America and Europe during the Permian Period, often having a tall spinal sail.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

pelvis

Pematangsiantar

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