EXTERN
extern, medical extern
(noun) a nonresident doctor or medical student; connected with a hospital but not living there
Source: WordNet® 3.1
Etymology 1
Noun
extern (plural externs)
A person affiliated with an institution in a lesser capacity, for example, as a non-resident or as a part-time affiliate.
A day-scholar.
Outward form or part; exterior.
Adjective
extern
(obsolete, rare) External; outward; not inherent
Etymology 2
Noun
extern (plural externs)
(programming) In the C and C++ programming languages, a variable that can be separately declared in many places, all of them referring to the same variable.
Source: Wiktionary
Ex*tern", a. Etym: [Cf. F. externe. See External.]
Definition: External; outward; not inherent. [Obs.] Shak.
Ex*tern", n. Etym: [Cf. F. externe.]
1. A pupil in a seminary who lives without its walls; a day scholar.
2. Outward form or part; exterior. [R.]
Source: Webster’s Unabridged Dictionary 1913 Edition