Definition of sima in English:


Syllabification: si·ma
Pronunciation: /ˈsīmə


  • 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.


early 20th century: blend of silica + magnesium.

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Pronunciation: ˈmeɪlstrəm
a powerful whirlpool in the sea