noun per·lite \ˈpər-ˌlīt\

Definition of perlite

  1. :  volcanic glass that has a concentric structure, appears as if composed of concretions, is usually grayish and sometimes spherulitic, and when heated expands to form a lightweight aggregate used especially in concrete and plaster and as a medium for potting plants


play \ˌpər-ˈli-tik\ adjective

Origin and Etymology of perlite

French, from perle pearl

First Known Use: 1833

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