WordNet (r) 3.0 (2006):

photostat
    n 1: a photocopy made on a Photostat machine
    2: a duplicating machine that makes quick positive or negative
       copies directly on the surface of prepared paper [syn:
       Photostat, Photostat machine]
    v 1: make a copy by means of a Photostat device

Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "Photostat":
   Ditto copy, X-ray, Xerox, Xerox copy, blowup, blueprint, calotype,
   capture on film, clone, contact print, contact printing, copy,
   cyanotype, ditto, double, dupe, duplicate, enlargement, facsimile,
   film, glossy, hectograph, hectograph copy, hologram, impress,
   impression, lantern slide, manifold, matte, microcopy, microfilm,
   microprint, mimeo, mimeograph, mimeograph copy, mug, multigraph,
   negative, offprint, pan, photocopy, photograph, photogravure,
   photomap, photostatic copy, positive, print, projection printing,
   proof, quadruplicate, radiograph, reduplicate, replicate, reprint,
   reproduce, roentgenograph, semi-matte, shoot, slide, snap,
   snapshoot, snapshot, stat, take a photograph, talbotype, trace,
   transcribe, transparency, triplicate