Perlite Definition
 pʉrlīt 
    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:
 perlitePlural:
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