sima

The lower layer of the earth’s outer crust that underlies the sial and is rich in silica, iron, and magnesium.

In architecture, an erroneous spelling of cyma.

A cyma.

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.

rock that form the continuous lower layer of the earth’s crust; rich in silicon and magnesium