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perlite definition

per·lite (pʉr′līt′)

noun

  1. Geol. 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.
  2. pearlite

Etymology: Fr < perle, pearl

Related Forms:

  • perlitic per·lit′ic (pər lit′ik) adjective

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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