The Collaborative International Dictionary of English v.0.48:

Latinist \Lat"in*ist\, n. [Cf. F. latiniste.]
   One skilled in Latin; a Latin scholar. --Cowper.
   [1913 Webster]

         He left school a good Latinist.          --Macaulay.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Latinist
    n 1: a specialist in the Latin language