The Collaborative International Dictionary of English v.0.48:

Collegian \Col*le"gi*an\, n.
   A member of a college, particularly of a literary institution
   so called; a student in a college.
   [1913 Webster]

WordNet (r) 3.0 (2006):

collegian
    n 1: a student (or former student) at a college or university
         [syn: collegian, college man, college boy]