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ferrous oxide

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noun Chemistry.
  1. a black powder, FeO, insoluble in water, soluble in acid.

Origin of ferrous oxide

First recorded in 1870–75
Also called iron monoxide.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
ferrous oxide in Science

ferrous oxide

  1. A black powder used to make steel, green heat-absorbing glass, and enamels. Chemical formula: FeO.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.