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Meaning of Ptolemaeus

Ptol•e•mae•us

Pronunciation: (tol"u-mā'us), [key]
— n.
  1. a walled plain in the third quadrant of the face of the moon: about 90 miles (144 km) in diameter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.