Definition of sima in English:

sima

Syllabification: si·ma
Pronunciation: /ˈsīmə
 
/

noun

Geology
  • The material of the lower part of the earth’s crust, underlying both the ocean and the continents, characterized as relatively dense and rich in silica and magnesia. Contrasted with sial.
    More example sentences
    • The sial and sima both form the earth's crust which varies in thickness.

Origin

early 20th century: blend of silica + magnesium.

More definitions of sima

Definition of sima in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day maelstrom
Pronunciation: ˈmeɪlstrəm
noun
a powerful whirlpool in the sea