Serum Definition

sîrəm
sera, serums
noun
serums
The clear, yellowish fluid of the blood which separates from a blood clot after coagulation and shrinkage.
Webster's New World
A clear, watery animal fluid, as serous fluid.
Webster's New World
Blood serum containing agents of immunity, taken from an animal made immune to a specific disease by inoculation: it is used as an antitoxin and for diagnosis.
Webster's New World
The whey of milk.
Webster's New World
The thin, watery part of a plant fluid.
Webster's New World

Other Word Forms of Serum

Noun

Singular:
serum
Plural:
sera, serums

Origin of Serum

  • From Latin serum (“whey"). Cognates: French sérum, Spanish suero, Italian siere, siero.

    From Wiktionary

  • Latin whey, serum

    From American Heritage Dictionary of the English Language, 5th Edition

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