RhymeZone: zippeite definitions

Definitions of zippeite:

noun: (mineralogy) A hydrous potassium uranium sulfate mineral with chemical formula K₄(UO₂)₆(SO₄)₃(OH)₁₀·4(H₂O), forming yellow to reddish-brown monoclinic-prismatic crystals with perfect cleavage and formerly used in the manufacture of paint.

(Definitions from Wiktionary)