The phrase "specific molecules" refers to particular or particularized substances, like tiny particles, that are identifiable and unique. These molecules can have different properties and functions. Full definition
Researchers say the test — which detects levels of specific molecules in blood — will help doctors identify which patients arriving in hospital need more intense treatment. (sciencedaily.com)
Based on the colors of light that reach us, scientists can detect the «fingerprints» of specific molecules. (discovermagazine.com)
More in - depth observations may confirm the rate at which its atmosphere is leaking, and may identify specific molecules. (newscientist.com)