sima(redirected from Ssu-ma)
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The lower layer of the earth's outer crust that underlies the sial and is rich in silica, iron, and magnesium.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Geological Science) the silicon-rich and magnesium-rich rocks of the earth's oceanic crust, the most abundant individual rock being basalt
2. (Geological Science) the earth's continental lower crust, probably comprised of gabbro rather than basalt
[C20: from si(lica) + ma(gnesia)]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Noun||1.||sima - rock that form the continuous lower layer of the earth's crust; rich in silicon and magnesium|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
sima[ˈsaɪmə] n (Geol) → sima m
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995