cementite

English Thesaurus

1. a chemical compound that is a constituent of steel and cast iron; very hard and brittle (noun.substance)

hypernym	:	chemical compound, compound,
definition	:	(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight (noun.substance)

substance meronym	:	pearlite,
definition	:	a lamellar mixture of cementite and ferrite formed during the cooling of austenite; a constituent of steel and cast iron (noun.substance)