Also found in: Encyclopedia, Wikipedia.
A black powder, FeO, used in the manufacture of steel, green heat-absorbing glass, and enamels.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a black powder, FeO, insoluble in water, soluble in acid, used in making glass and steel.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.