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manganate

manganate Chem.
  (ˈmæŋgənət)
  [f. mangan-ic + -ate.]
  A salt of manganic acid.

1839 Penny Cycl. XIV. 382/2 Manganate of potash is easily prepared. 1891 Thorpe Dict. Appl. Chem. II. 500/1 All manganates..oxidise hydrochloric acid.

Oxford English Dictionary

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