Vac-tor

Pronunciation: \'Vak-ter also -tor\
Function: noun 
Date: 21st century
                   
1:  a Virtual Actor
2:  one who performs a role in real-time when logged into
    a Virtual World or 3D Collaborative On-Line Environment
3a: one who represents, via an avatar, a character in a 
    simulation or training event
 b: one who behaves as if acting a part through the use of
    an avatar