The Collaborative International Dictionary of English v.0.48:

Photo-engraving \Pho`to-en*grav"ing\, n. [Photo- + engraving.]
   The process of obtaining an etched or engraved plate from the
   photographic image, to be used in printing; also, a picture
   produced by such a process.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Photo-engrave \Pho`to-en*grave"\, v. t. [imp. & p. p.
   Photo-engraved; p. pr. & vb. n. Photo-engraving.] [Photo-
   + engrave.]
   To engrave by a photomechanical process; to make a
   photo-engraving of. -- Pho`to-en*grav"er, n.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

photoengraving
    n 1: an engraving used to reproduce an illustration [syn:
         halftone, halftone engraving, photoengraving]

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "photoengraving":
   albertype, aquatint, book printing, cerography, chalcography,
   chromotypography, chromotypy, chromoxylography, collotype,
   color printing, crayon engraving, cribbling, drypoint,
   electronography, electrostatic printing, etching, graphic arts,
   gravure, halftone engraving, history of printing, intaglio,
   job printing, letterpress, letterpress photoengraving,
   line engraving, lithography, lithogravure, lithophotogravure,
   metal cut, mezzotint, mimeograph, offset, offset lithography,
   onset, palaeotypography, photo-offset, photochemical process,
   photogelatin process, photographic reproduction, photography,
   photolithography, phototypography, phototypy, photozincography,
   planographic printing, planography, plate engraving, printing,
   printmaking, publication, publishing, pyrogravure, relief method,
   relief printing, rotary photogravure, rotogravure, sheetwork,
   steel engraving, stencil, three-color printing, two-color printing,
   typography, typolithography, wood engraving, wood-block printing,
   woodburning, woodcut, xerography, xeroprinting, xylotypography,
   zincography