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.

QUIZZES

HEED THE VOX POPULI, AND TAKE THIS WORD OF THE DAY QUIZ!

Test your memory on these verbal firecrackers from the week of June 29 to July 5!
Question 1 of 7
anchorite

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

Definition 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. 2020

Example sentences 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 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