pearlite

[pur-lahyt]

noun

Metallurgy. a microscopic lamellar structure found in iron or steel, composed of alternating layers of ferrite and cementite.

Petrography. perlite.

Origin of pearlite

First recorded in 1885–90; pearl¹ + -ite¹

Related formspearl·it·ic

[pur-lit-ik] /pɜrˈlɪt ɪk/, adjective

perlite

or pearl·ite

[pur-lahyt]

noun Petrography.

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

From French, dating back to 1825–35; see origin at pearl¹, -ite¹

Related formsper·lit·ic

[pur-lit-ik] /pɜrˈlɪt ɪk/, adjective

Dictionary.com Unabridged 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.
Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 7
Various
The magnification is too small to show the zebra striping of the pearlite.
Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 7
Various
Several other ingredients of importance, as pearlite, illustrated on the opposite page, have also been studied.
Inventors at Work
George Iles

British Dictionary definitions for pearlite

pearlite

noun

the lamellar structure in carbon steels and some cast irons that consists of alternate plates of pure iron and iron carbide

a variant spelling of perlite

Derived Formspearlitic (pɜːˈlɪtɪk), adjective

perlite

pearlite

noun

a variety of obsidian consisting of masses of small pearly globules: used as a filler, insulator, and soil conditioner

Derived Formsperlitic or pearlitic (pɜːˈlɪtɪk), adjective

Word Origin for perlite

C19: from French, from perle pearl 1

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012