Etymology
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pig iron (n.)

"iron in pigs," as it comes from a blast furnace, iron that has been run while molten into a mold in sand, 1660s; see pig (n.2) + iron (n.).

updated on June 08, 2020

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Definitions of pig iron from WordNet

pig iron (n.)
crude iron tapped from a blast furnace;
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.