extrinsic

Adjective

• not forming an essential part of a thing or arising or originating from the outside
  • extrinsic evidence
    
  • an extrinsic feature of the new building
    
  • that style is something extrinsic to the subject
    
  • looking for extrinsic aid
    

Related words

• Antonyms: 
  intrinsic , intrinsical