in·cog·ni·ta 
(ĭn′kŏg-nētə, ĭn-kŏgnĭ-tə)
(ĭn′kŏg-nētə, ĭn-kŏgnĭ-tə)adv. & adj.
With one's identity disguised or concealed. Used of a woman.
n.
A woman or girl whose identity is disguised or concealed.
[Italian, feminine of incognito, incognito; see INCOGNITO.]