The Collaborative International Dictionary of English v.0.48:

Prosopolepsy \Pros`o*po*lep"sy\, n. [Gr. ?; pro`swpon a face, a
   person + ? a taking, receiving, ? to take.]
   Respect of persons; especially, a premature opinion or
   prejudice against a person, formed from his external
   appearance. [R.] --Addison.
   [1913 Webster]