kainite noun. ['kʌɪnʌɪt, 'keɪ-] Also kainit [-ɪt]. M19.
[German Kainit, from Greek kainos new, recent (as being of recent formation): see -ITE¹.]
A white monoclinic mineral which is a double salt consisting of hydrated magnesium sulphate and potassium chloride, and is used as a fertilizer.

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