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sima (2)
si·ma
[
smə
]
noun
Definition:
rock forming Earth's lower crust:
the rocks that form the lower part of the Earth's crust, lying beneath the oceans and the continents and consisting mainly of silica and magnesia
[
Early 20th century. <silica + magnesium
]
si·ma·tic
[
si máttik
]
adjective
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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