Dictionary
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| D lay·er |
noun |
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| Definition: |
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1. meteorology
Same as D region (sense 1)
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2. lower layer of Earth's mantle: the lower layer of the Earth's mantle, from 720 km (450 mi) deep down to the boundary with the core
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| Encarta® World English Dictionary [North American Edition] © & (P)2007 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc. |
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