The Collaborative International Dictionary of English v.0.48:

Sinologue \Sin"o*logue\ (s[i^]n"[-o]*l[o^]g), n. [From L. Sinae,
   an Oriental people mentioned by Ptolemy, or Ar. Sin China or
   the Chinese + Gr. lo`gos discourse; formed like theologue:
   cf. F. sinologue.]
   A student of China and the Chinese; one versed in the Chinese
   language, literature, history, politics and culture.
   [1913 Webster +PJC]