en·dog·e·nous adj \en-ˈdäj-ə-nəs\
: growing from or on the inside <endogenous spores>
: caused by factors within the body or mind or arising from internal structural or functional causes <endogenous malnutrition> <endogenous psychic depression>
: relating to or produced by metabolic synthesis in the body <endogenous opioids> <endogenous amino acids>—compare exogenous
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