extrinsic

Concise Oxford English Dictionary © 2008 Oxford University Press:
extrinsic /ɪkˈstrɪnsɪk, ɛk-/

▶adjective

• 1 not essential or inherent.

• 2 (of a muscle) having its origin some distance from the part which it moves.

– derivatives
extrinsically adverb.

– origin C16 (in the sense ‘outward’): from late L. extrinsecus ‘outward’, based on exter ‘outer’.