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BNC: 4917 COCA: 9974
serum
noun medical /ˈsɪərəm/
singularserum
pluralserums or sera
  1. 1
    [C/U] a liquid that is put into someone's blood to help them to fight an infection or a poison 血清
     Synonyms and related words
    Types and forms of medicine: amphetamine, anabolic steroid, anaesthesia...
  2. 2
    [U] the thin yellow liquid that is part of blood and that separates from it when it clots (=becomes thick and hard) 血浆
     Synonyms and related words
BNC: 4917 COCA: 9974
BNC: 4917 COCA: 9974

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