serum

1. (countable, uncountable)Blood serum used as a blood product, in the practice of medicine: blood serum from the tissues of immunized animals (human or nonhuman), containing antibodies and used to transfer immunity to another individual (human or nonhuman).

   Near-synonym: antiserum

2. (countable, uncountable)A watery liquid from animal tissue, especially one that moistens the surface of serous membranes or that is exuded by such membranes when they become inflamed, such as in edema or a blister.

   Serum

   сы́вороткаsývorotka

   сиро́ваткаsyróvatka

3. (countable, uncountable)The watery portion of certain other animal fluids, such as milk; whey.

4. (countable, uncountable)A skincare product of varying consistencies with a high concentration of one or more active ingredients, for a targeted purpose, such as preventing acne, repairing sun damage, or moisturizing.

1. Flavio was injected with the serum.

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2. Lukas injected himself with the invisibility serum.

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3. Flavio was drenched in serum, barely alive.

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4. Dmitri was injected with a paralyzing serum.

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5. The serum was responsible for the horrible disfiguration.

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