| 1. | not essential or inherent; not a basic part or quality; extraneous: facts that are extrinsic to the matter under discussion. |
| 2. | being outside a thing; outward or external; operating or coming from without: extrinsic influences. |
| 3. | Anatomy. (of certain muscles, nerves, etc.) originating outside the anatomical limits of a part. |

extrinsic ex·trin·sic (ĭk-strĭn'sĭk, -zĭk)
adj.
Of or relating to an organ or a structure, especially a muscle, originating outside of the part where it is found or upon which it acts; adventitious.