Pearlite
Full definition of pearlite
Noun
pearlite
(countable and uncountable; plural pearlites)- A two-phased lamellar structure composed of alternating layers of alpha ferrite and cementite that occurs in some steels and cast irons, having a pearlescent appearance.
- (mineral) Alternative form of perlite
- 1835, British Association for the Advancement of Science...inclosing great masses of pearlite and felspar.