The Collaborative International Dictionary of English v.0.48:

Chevrotain \Chev`ro*tain"\, n. [F. chevrotin, OF. chevrot little
   goat, roe, dim. of chevre goat. See Chevron.] (Zool.)
   A small ruminant of the family Tragulid[ae] a allied to the
   musk deer. It inhabits Africa and the East Indies. See
   Kanchil.
   [1913 Webster]

WordNet (r) 3.0 (2006):

chevrotain
    n 1: very small hornless deer-like ruminant of tropical Asia and
         west Africa [syn: chevrotain, mouse deer]