Definition of picromerite in English:

picromerite

noun

Mineralogy
  • A mineral that is a sulphate of magnesium and potassium, K₂Mg(SO₄)₂·6H₂O, crystallizing in the monoclinic system and usually occurring as colourless or white masses and crusts.

Origin

Mid 19th century; earliest use found in Henry Watts (1815–1884), chemist. From picro- + ancient Greek μεριδ-, μερίς part, after Italian Picromeride.