ˈpərˌlīt noun
( -s )
Etymology: French perlite, from perle pearl + -ite — more at pearl
1. : the lamellar mixture of ferrite and cementite in the microstructure of slowly cooled iron-carbon-base alloys occurring normally as a principal constituent of both steel and cast iron
2. : perlite
• pearl·it·ic | ̷ ̷|lid.ik adjective