(1) Watery proteinaceous portion of the blood that remains after clotting. Syn: blood serum. (2) Clear watery fluid especially that moistening the surface of serous membranes or that exuded through inflammation of any of these membranes
International Union of Pure and Applied Chemistry IUPAC, Glossary for Chemists of Terms Used in Toxicology, Prepared for publication by J.H. Duffus, NC., USA 1993. http://www.inchem.org/documents/harmproj/harmproj/ harmproj1.pdf & http://old.iupac.org/reports/1993/6509duffus/c.htm l, (IUPAC/ Tox - Amer) {107}