chemical fingerprint

noun

a distinctive characteristic or pattern indicating the presence of a certain molecule, used to identify a chemical.

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They were looking for a possible chemical fingerprint of space travel.

Observatories have previously detected hydrogen’s chemical fingerprint in the lunar “regolith,” or soil.

The researchers compared the chemical fingerprints of these fossilized eggs with those of eggs from hard-shelled dinosaur.

This technique offers what is basically a chemical fingerprint of a material.

They matched the beached blocks to those in the collections using those chemical fingerprints.

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