Exogenous

[ek'sɒdʒinәs]

(adj.) derived or originating externally .

Edited by Antony--From WordNet

(a.) Pertaining to, or having the character of, an exogen; -- the opposite of endogenous.

(a.) Growing by addition to the exterior.

(a.) Growing from previously ossified parts; -- opposed to autogenous.

Editor: Susanna