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.

Origin of sima

1
< German (1909), equivalent to Latin si(licium) silicium + ma(gnesium) magnesium
Related formssi·mat·ic [sahy-mat-ik] /saɪˈmæt ɪk/, adjective

Definition for sima (2 of 2)

sima

2
[ 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. 2019

Examples from the Web for sima

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 Formssimatic (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