exogenous

(biology) Produced or originating outside of an organism.

(biology) Growing as an exogen, by successive additions to the outside.

(medicine, of a disease) Having a cause external to the infected organism.

(economics, of a model) Being or relating to a change that comes from outside the model and is not explained by the model.

(databases, of a key) Having no meaning in itself, such as an automatically generated sequential identifier.

(biology, dermatology, uncommon) Related to the exogen growth phase.