endogenous
adj.adj. describing something that comes from inside a person or thing rather than from the outside. In science, it refers to things that are produced naturally within a system.
adj. originating or produced within a system, organism, or entity rather than being introduced from an external source. Often used in biological and economic contexts to distinguish internal factors from external ones.
The body produces endogenous hormones to regulate growth.
Economists often distinguish between endogenous factors, like consumer spending, and exogenous factors, like natural disasters.
The study suggests that the plant's resistance to disease is due to endogenous compounds rather than the external application of synthetic pesticides.
From endogen + -ous or endo- + -genous. Piecewise doublet of indigenous.