(1) Dispersal of a substance and its derivatives throughout the natural environment. (2) Dispersal of a substance within an organism, including metabolism, storage and excretion. (3) Final location of a substance within an organism after dispersal
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}