American Heritage® Dictionary of the English Language, Fourth Edition
- n. A red to yellow-orange zinc ore, ZnO.
Century Dictionary and Cyclopedia
- n. See zinkite.
- n. mineralogy A yellow, orange or dark-red mineral form of zinc oxide, often also containing small amounts of manganese, with a chemical formula (Zn,Mn2+)O, an important ore of zinc.
GNU Webster's 1913
- n. (Min.) Native zinc oxide; a brittle, translucent mineral, of an orange-red color; -- called also
red zinc ore, and red oxide of zinc.
“They consist of willemite and zincite, together with large amounts of franklinite (an iron-manganese oxide) and silicates, in a pre-Cambrian white crystalline limestone near its contact with a coarse-grained granite-gneiss.”
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