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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.

An advert for a £49 face serum has been banned over misleading claims that it made users look up to five years younger.

From BBC • Apr. 28, 2026

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

Baron dragged and carried McCormick to a nearby hut, sat him up on a cot, and gave him a large transfusion of blood serum from Africans who had survived Ebola.

From "The Hot Zone" by Richard Preston




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