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sima

1
[ sahy-muh ]
/ ˈsaɪ mə /
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noun Geology.
an assemblage of rocks, rich in silica and magnesium, that constitutes the lower layer of the earth's crust and is found beneath the ocean floors and the sial of continents.
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Origin of sima

1
<German (1909), equivalent to Latin si(licium) silicium + ma(gnesium) magnesium

OTHER WORDS FROM sima

si·mat·ic [sahy-mat-ik], /saɪˈmæt ɪk/, adjective

Other definitions for sima (2 of 2)

sima2
[ sahy-muh ]
/ ˈsaɪ mə /

noun Architecture.
the uppermost member of a full classical order, usually a cyma recta, representing a roof gutter; cymatium.

Origin of sima

2
Variant of cyma
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use sima in a sentence

British Dictionary definitions for sima

sima
/ (ˈsaɪmə) /

noun
the silicon-rich and magnesium-rich rocks of the earth's oceanic crust, the most abundant individual rock being basalt
the earth's continental lower crust, probably comprised of gabbro rather than basalt

Derived forms of sima

simatic (saɪˈmætɪk), adjective

Word Origin for sima

C20: from si (lica) + ma (gnesia)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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