The Collaborative International Dictionary of English v.0.48:

Masseuse \Mas`seuse"\ (m[.a]*s[^u]z"), n.; pl. Masseuses (F.
   m[.a]*s[^u]z"). [F.]
   A woman who practices massage.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

masseuse
    n 1: a female massager