Webster's 1913 Dictionary
KAINITE
Kai "nite, n. Etym: [Gr. (Min. )
Defn: A compound salt consisting chiefly of potassium chloride and magnesium sulphate, occurring at the Stassfurt salt mines in Prussian Saxony.
New American Oxford Dictionary
kainite
kai nite |ˈkīˌnīt, ˈkā -ˈkaɪnaɪt | ▶noun a white mineral consisting of a double salt of hydrated magnesium sulfate and potassium chloride. ORIGIN mid 19th cent.: from German Kainit, from Greek kainos ‘new, recent, ’ because of the mineral's recent formation.
Oxford Dictionary
kainite
kainite |ˈkʌɪnʌɪt, ˈkeɪnʌɪt | ▶noun [ mass noun ] a white mineral consisting of a double salt of hydrated magnesium sulphate and potassium chloride. ORIGIN mid 19th cent.: from German Kainit, from Greek kainos ‘new, recent ’, because of the mineral's recent formation.
The Wordsmith Dictionary