PEARLITE

pearlite

(noun) a lamellar mixture of cementite and ferrite formed during the cooling of austenite; a constituent of steel and cast iron

Source: WordNet® 3.1

Etymology

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

Source: Wiktionary

Pearl"ite, Pearl"stone`, n. (Min.)

Definition: A glassy volcanic rock of a grayish color and pearly luster, often having a spherulitic concretionary structure due to the curved cracks produced by contraction in cooling. See Illust. under Perlitic.

Source: Webster’s Unabridged Dictionary 1913 Edition