serum
noun/ˈsɪərəm/
/ˈsɪrəm/
(plural sera
/ˈsɪərə/
/ˈsɪrə/
, serums)- [uncountable] (biology) the thin liquid that remains from blood when the rest has clotted
- [uncountable, countable] (medical) serum taken from the blood of an animal and given to people to protect them from disease, poison, etc.
- snakebite serum
- [uncountable] any liquid like water in body tissue
Word Originlate 17th cent.: from Latin, literally ‘whey’.
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serum