ferroalloy[fer′ō al′o̵i′, -ə lo̵i′]
ferroalloy definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of various alloys of iron used in the manufacture of steel: named from the added metal, as ferrochromium, ferromanganese, etc.
ferroalloy definition by American Heritage Dictionary
Any of various alloys of iron and one or more other elements, such as manganese or silicon, used as a raw material in the production of steel.