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sima

1

[ sahy-muh ]

noun

, Geology.
  1. 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.


sima

2

[ sahy-muh ]

noun

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

sima

/ saɪˈmætɪk; ˈsaɪmə /

noun

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


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Derived Forms

  • simatic, adjective

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Other Words From

  • si·mat·ic [sahy-, mat, -ik], adjective

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Word History and Origins

Origin of sima1

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

Origin of sima2

Variant of cyma

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Word History and Origins

Origin of sima1

C20: from si ( lica ) + ma ( gnesia )

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