The Collaborative International Dictionary of English v.0.48:

Masseur \Mas`seur"\ (m[.a]*s[^u]r"), n.; pl. Masseurs
   (m[.a]*s[^u]rz"; F. m[.a]*s[^u]r"). [F. See Massage.]
   1. A man who practices massage.
      [Webster 1913 Suppl.]

   2. An instrument used in the performance of massage.
      [Webster 1913 Suppl.]