sima

FREQ #26968

n. [地]硅镁层

词形变化

simas 复数

释义与例句

n.
  1. 1.

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

    建筑
  2. 1.

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

    不可数 地质

词汇关系

名词

上位词 2

rock stone

整体词 1

crust

词源

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

来源：wiktionary