- Metallurgy. a microscopic lamellar structure found in iron or steel, composed of alternating layers of ferrite and cementite.
- Petrography. perlite.
Origin of pearlite
- 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
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Examples from the Web for 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.Inventors at Work
- 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
- a variety of obsidian consisting of masses of small pearly globules: used as a filler, insulator, and soil conditioner
C19: from French, from perle pearl 1
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