Metallurgy. a microscopic lamellar structure found in iron or steel, composed of alternating layers of ferrite and cementite.
Origin of pearlite
Related formspearl·it·ic [pur-lit-ik] /pɜrˈlɪt ɪk/, adjective
First recorded in 1885–90; pearl1
a volcanic glass in which concentric fractures impart a distinctive structure resembling masses of small spheroids, used as a plant growth medium.
Origin of perlite
Related formsper·lit·ic [pur-lit-ik] /pɜrˈlɪt ɪk/, adjective
dating back to 1825–35;
see origin at pearl1
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for pearlite
Historical Examples of pearlite
The iron thus liberated, as the ferrite of this pearlite, changes simultaneously to α-ferrite.
The magnification is too small to show the zebra striping of the pearlite.
Several other ingredients of importance, as pearlite, illustrated on the opposite page, have also been studied.
British Dictionary definitions for pearlite
Derived Formspearlitic (pɜːˈlɪtɪk), adjective
the lamellar structure in carbon steels and some cast irons that consists of alternate plates of pure iron and iron carbide
Derived Formsperlitic or pearlitic (pɜːˈlɪtɪk), adjective
a variety of obsidian consisting of masses of small pearly globules: used as a filler, insulator, and soil conditioner
Word Origin for perlite
C19: from French, from perle pearl 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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