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Meaning of nodular cast iron

nod'ular cast' i'ron

Pronunciation: [key]
  1. any of various cast irons strengthened by having the graphite content in the form of nodules rather than flakes, and containing cerium or magnesium as well as other additives. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.