Definition of serum

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  • serum is a valid Scrabble US word with a point value of 7
  • serum is a valid Scrabble UK word with a point value of 7
  • serum is a valid Words with friends word with a point value of 9

Definition of serum

  • an amber, watery fluid, rich in proteins, that separates out when blood coagulates (noun)

    Synonyms

    1. blood serum

See definition of serum in Merriam Webster