The Collaborative International Dictionary of English v.0.48:

houseman \houseman\ n.
   an advanced student or graduate in medicine gaining
   supervised practical experience in a hospital or other
   medical institution. [British]

   Syn: intern, interne, internist, medical intern.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

intern \in*tern"\, n. [F.] (F. pron. [a^]N`t[^a]rn")
   1. (Med.) A resident physician in a hospital, especially one
      who has recently received the Doctorate and is practising
      under supervision of experienced physicians, as a
      continuation of the training process; a house physician;
      also called houseman in Britain. [Also spelled
      interne.]
      [Webster 1913 Suppl. +PJC]

   2. A person working as an apprentice to gain experience in an
      occupation; sometimes the position is paid a salary, and
      other times it is not; as, a white house intern; an intern
      in a law firm.
      [PJC]

WordNet (r) 3.0 (2006):

houseman
    n 1: an advanced student or graduate in medicine gaining
         supervised practical experience (`houseman' is a British
         term) [syn: intern, interne, houseman, medical
         intern]