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chemical fingerprint

a distinctive characteristic or pattern indicating the presence of a certain molecule, used to identify a chemical. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for chemical fingerprint
  • Exposure to a particular gas yields a specific pattern of colored dots, providing a chemical fingerprint.
  • Compounds absorb parts of the light spectrum differently-making a kind of chemical fingerprint.

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