noun
an oxide of manganese found naturally as hausmannite
• Hypernyms: ↑compound, ↑chemical compound
• Substance Holonyms: ↑hausmannite
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noun : a compound Mn3O4 or MnMn2O4 found in nature as hausmannite and obtained as a reddish brown powder by strongly heating manganese oxides or hydroxides in air — called also manganomanganic oxide, red manganese oxide
Useful english dictionary. 2012.