sima

noun — 2 senses

noun

Etymology From the Ancient Greek σιμός (simós, “bent upwards”).

Architecture The upturned edge of a roof which acts as a gutter; a cyma.

noun

Etymology Coined by Eduard Suess in 1909, in Das Antlitz der Erde, as a blend of silicon + magnesium.

Geography, Geology, Natural sciences The lower layer of the earth's outer crust that underlies the sial and is rich in silica, iron, and magnesium.

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.