extern(n = noun.person) medical extern - a nonresident doctor or medical student; connected with a hospital but not living there;
is a kind of doc, doctor, dr., md, medico, physician
External; outward; not inherent. Shak. [1913 Webster]
1. A pupil in a seminary who lives without its walls; a day scholar. [1913 Webster]
2. Outward form or part; exterior. [1913 Webster]
3. same as externe. [PJC]
a person affiliated with an institution who does not reside there; [Webster 1913 Suppl.]