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Ptolemaeus
Ptol·e·mae·us [ tòllə máy əss ] large walled plain on the Moon that is noticeably hexagonal in shape and has a highly cratered floor. Located northeast of Mare Imbrium, it is approximately 140 km (85 mi) across.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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