intrinsic
/in-ˈtrin-zik/
adjective
belonging to the essential nature or constitution of a thing
being or relating to a semiconductor in which the concentration of charge carriers is characteristic of the material itself instead of the content of any impurities it contains
originating or due to causes within a body, organ, or part
the intrinsic worth of a gem
noun
a substance produced by normal gastrointestinal mucosa that facilitates absorption of vitamin B12