Definition of "pig iron" [pig iron]

• Crude iron cast in blocks. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Page 26 1600 tons of pig iron annually; Ballendine's 1000; Callaway's, Millar's, and Zane's, about 600 each."
• "It's old steel, made from pig iron in a Bessemer furnace."