Perlite Definition

pûrlīt
noun
A greenish volcanic glass, similar to obsidian, with a pearly luster and multiple, minute concentric cracks, used as insulation and in making concrete, plaster, etc.
Webster's New World
Webster's New World

Other Word Forms of Perlite

Noun

Singular:
perlite
Plural:
perlites

Origin of Perlite

  • French (from perle pearl) (from Old French pearl1) or German Perlit (from Perle pearl) (ultimately from Vulgar Latin pernula)

    From American Heritage Dictionary of the English Language, 5th Edition

  • From French perle (“pearl") + -ite

    From Wiktionary

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