The Collaborative International Dictionary of English v.0.48:

Identikit \Identikit\ prop. n. [trademark]
   A set of images containing a wide variety of facial features,
   such as noses, hairlines, chins, etc. on transparencies which
   can be overlayed in combinations to build up a picture of a
   person; it is used by police agencies to create concrete
   images of a crime suspect from the descriptions of witnesses;
   the image created with the kit is also called an Identikit,
   or more properly an Identikit picture. [Trademark]

   Syn: Identikit picture.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Identikit picture
    n 1: a likeness of a person's face constructed from descriptions
         given to police; uses a set of transparencies of various
         facial features that can be combined to build up a picture
         of the person sought [syn: Identikit, Identikit
         picture]