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An impurity or foreign substance present in a material or environment that affects one or more properties of the material (ASTM).

Synonyms and Related Terms

Verunreinigung (Deut.); contaminant (Fr.);

Sources Checked for Data in Record

  • Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

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