exogenous
ex.og.e.nous \ek-'sa:j-*-n*s\ aj [F exoge'ne exogenous, fr. exo- + -ge'ne (fr. Gk -geneB-s born) - more at -GEN : originating from or due to external causes : as : growing from or on the outside {~ spores} of disease : having a cause external to the body : of, relating to, or produced by the metabolism of nitrogenous substanc es obtained from food - ex.og.e.nous.ly av