Definition of "sima"
- noun
The lower layer of the earth's outer crust that underlies the sial and is rich in silica, iron, and magnesium.
The upturned edge of a roof which acts as a gutter; a cyma.
- Sources
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The lower layer of the earth's outer crust that underlies the sial and is rich in silica, iron, and magnesium.
The upturned edge of a roof which acts as a gutter; a cyma.