A white, gray, pink, or black mineral, MgSO4·KCl·3H2O, used as a fertilizer and a source of potassium compounds.(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.
Use "kainite" in a sentence
"To the substances used for treating brewing liquors already mentioned we may add kainite, a naturally deposited composite salt containing potassium and magnesium sulphates and magnesium chloride."
"Copperas or blue stone, kainite and superphosphate are sometimes used for the same purpose."
"The crude salts, kainite and sylvinite, and the muriate contain chlorine and are not considered good for potatoes and tobacco as the chlorine lowers the quality of these products."