sima

1
[ sahy-muh ]
/ ˈsaɪ mə /

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

Words nearby sima

silviculture, silymarin, sim, sim card, sim., sima, simak, simar, simarouba, simaroubaceous, simazine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for simatic

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