external

adj. 1 a of or on the outside or visible part. B coming from the outside or an outside source. 2 relating to a country's foreign affairs. 3 outside the conscious subject (the external world). 4 (of medicine etc.) For use on the outside of the body. 5 for students taking the examinations of a university without attending it. n. (in pl.) 1 outward features or aspect. 2 external circumstances. 3 inessentials.  externality n. Externally adv. [latin externus outer]

a. Outward; exterior; relating to the outside, as of a body; being without; acting from without; -- opposed to internal; as, the external form or surface of a body.