Definition of "magnesite" [mag•ne•site]

• A white, yellowish, or brown mineral, magnesium carbonate, MgCO3, used in the manufacture of magnesium oxide and carbon dioxide. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "District Court in Trenton, N.J., alleges that companies in China conspired to drive up the price of magnesite, which is used in steelmaking."
• "It occurs in a number of localities as magnesite, which is usually amorphous, but sometimes forms pure crystals resembling calcite."
• "Rust promoting agents are also acids and most salt solutions; consequently, smoke, sodium chloride, salt water, and binders such as magnesite mortar and gypsum."