readmission

from WordNet (r) 3.0 (2006)

readmission
    n 1: the act of admitting someone again; "the surgery was
         performed on his readmission to the clinic"

from The Collaborative International Dictionary of English v.0.48

Readmission \Re`ad*mis"sion\ (r[=e]`[a^]d*m[i^]sh"[u^]n), n.
   The act of admitting again, or the state of being readmitted;
   as, the readmission of fresh air into an exhausted receiver;
   the readmission of a student into a seminary.
   [1913 Webster]