serum
-
Watery proteinaceous portion of the blood that remains after
clotting. Synonym: blood serum
-
Clear watery fluid especially that moistening the surface of serous
membranes or that exuded through inflammation of any of these
membranes.
Source:
PAC, 2004, 76, 1033
(Glossary of terms used in toxicokinetics (IUPAC Recommendations 2003))
on page 1070