[ sahy-muh ]
/ ˈsaɪ mə /
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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OTHER WORDS FROM simasi·mat·ic [sahy-mat-ik] /saɪˈmæt ɪk/, adjective
Words nearby sima
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for simatic
/ (ˈsaɪmə) /
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 simasimatic (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