Definition of sima in English:


Line breaks: sima
Pronunciation: /ˈsʌɪmə


[mass noun] Geology, dated
The material of the lower part of the earth’s crust, underlying both the ocean and the continents, characterized as relatively heavy 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.

Definition of sima in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day impudicity
Pronunciation: ˌɪmpjʊˈdɪsɪti
lack of modesty