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nickelic oxide

noun Chemistry.

a gray-black, water-insoluble powder, Ni2O3, which, at 600°C, decomposes to nickel oxide: used chiefly in storage batteries as an oxidizing agent.

Also called black nickel oxide, nickel sesquioxide.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019