also  ex*o*gen*ic  adj 1  :  growing from or on the outside < spores>   2  :  caused by factors (as food or a traumatic factor) or an agent (as a disease-producing organism) from outside the organism or system < obesity>  < psychic depression>   3  :  introduced from or produced outside the organism or system : specif  :  not synthesized within the organism or system - compare ENDOGENOUS  ex*og*e*nous*ly adv 
 
 
 
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