Noun
a white solid mineral that occurs naturally as periclase; a source of magnesium
Source: WordNetEven the sheath of a magnesium oxide insulating the thermocouple does not keep the hydrogen out. Source: Internet
Magnesium oxide, which is rocky on Earth, can be a liquid metal at the pressures and temperatures found in super-Earths and could generate a magnetic field in the mantles of super-Earths. Source: Internet
The magnesium oxide content ( MgO ) shall not exceed 5.0% by mass. Source: Internet
Magnesium oxide and other magnesium compounds are also used in the agricultural, chemical, and construction industries. Source: Internet