名詞 extern:

1. a nonresident doctor or medical student; connected with a hospital but not living there
   同義詞：medical extern

extern 或 ex.terne

n.（名詞）
A person associated with but not officially residing in an institution, especially a nonresident physician on a hospital staff.
不住院的醫(yī)生：與一機(jī)構(gòu)聯(lián)合但不正式住在其中的人，尤指醫(yī)院職員中不住院的內(nèi)科醫(yī)生

來(lái)源：
Latin externus [external] * see external
拉丁語(yǔ) externus [外來(lái)的] *參見(jiàn) external

【引伸】
ex.ternship.
n.（名詞）