Cast iron Meaning, Definition & Usage

  1. noun an alloy of iron containing so much carbon that it is brittle and so cannot be wrought but must be shaped by casting

WordNet

Definitions
  1. (Metal.), an impure variety of iron, containing from three to six percent of carbon, part of which is united with a part of the iron, as a carbide, and the rest is uncombined, as graphite. It there is little free carbon, the product is white iron; if much of the carbon has separated as graphite, it is called gray iron. See also Cast iron, in the Vocabulary.

Webster 1913