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Definitions

serum

[seer-uhm] / ˈsɪər əm /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

After confirming that the device could detect miR-21 in a controlled buffer solution, they tested it using human serum from lung cancer patients to simulate an actual blood test.

From Science Daily • Feb. 16, 2026

After years of being mistakenly linked to high serum cholesterol, eggs were rolled out to the public as a “healthy” food by the FDA External link in December 2024 External link.

From Barron's • Dec. 11, 2025

As the YouTube hit demonstrates, hot sauce isn’t just for daredevils and masochists: It’s a truth serum.

From The Wall Street Journal • Nov. 20, 2025

Despite questioning his decision to forgo taking a super-soldier serum to gain enhanced powers, Wilson saves the day because of his capacity for empathy and belief in other people’s ability to change.

From Los Angeles Times • Feb. 19, 2025

“If you swallow that serum, you’ll never be able to find your way back to him.”

From "Allegiant" by Veronica Roth