Definition of "dolomite" [dol•o•mite]

• A white or light-colored mineral, essentially CaMg(CO3)2, used in fertilizer, as a furnace refractory, and as a construction and ceramic material. (noun)
• A magnesia-rich sedimentary rock resembling limestone. (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.

• "Known as the "Pale Mountains," they boast a chemical composition dubbed dolomite stratified calcium magnesium carbonate, deposited more than 230 million years ago when seawater covered the region."
• "There it will be forced into spaces in a type of limestone called Knox dolomite, which is found beneath much of Kentucky and the region."
• "MgCO3 are referred to as "dolomite" or as dolomitic limestone, and those containing between 5 -20 % MgCO3, as magnesian limestone."