Artificial intelligent assistant

heliogravure

heliogravure
  (hiːlɪəʊˈgreɪvjʊə(r))
  [a. F. héliogravure, f. helio- + gravure engraving.]
  A process of engraving by means of the action of light on a sensitized surface; an engraved plate, or an engraving, thus obtained; photogravure. Also attrib.

1879 Furnivall New Shaks. Soc. Rep. 7 A héliogravure reproduction by M. Dujardin, of Virtue's engraving. 1881 Athenæum 16 Apr. 521/2 The medium of reproduction..is besides somewhat antiquated in these days of autotype and heliogravure. 1883 Pall Mall G. 29 Nov., Phototype, heliogravure, woodcuts, photo and chromo lithography, have been each used according to need.

Oxford English Dictionary

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