Skip to definition.
Get the FREE one-click dictionary software for Windows.


Noun: serum (serums,sera)  si(u)rum
  1. An amber, watery fluid, rich in proteins, that separates out when blood coagulates
    - blood serum

Derived forms: sera, serums

See also: serous

Type of: bodily fluid, body fluid, humor [US], humour [Brit, Cdn], liquid body substance

Part of: blood

Encyclopedia: Serum