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ambrotype

[am-bruh-tahyp] /ˈæm brəˌtaɪp/
noun, Photography
1.
an early type of photograph, made by placing a glass negative against a dark background.
Origin
1850-1855
1850-55, Americanism; < Greek ámbro(tos) immortal (see ambrosia) + -type
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for ambrotype
  • The ambrotype was less expensive to make than a daguerreotype.
  • Original photograph: an ambrotype now known through copy prints.
British Dictionary definitions for ambrotype

ambrotype

/ˈæmbrəʊˌtaɪp/
noun
1.
(photog) an early type of glass negative that could be made to appear as a positive by backing it with black varnish or paper
Word Origin
C19: from Greek ambrotos immortal + -type; see ambrosia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for ambrotype
n.

1855, American English, apparently from Greek ambrotos "immortal, imperishable" (see ambrosia), with second element from daguerreotype. A type of photograph on glass with lights given by silver and shades by a dark background showing through.

This invention consists in an improved process of taking photographic pictures upon glass, and also of beautifying and preserving the same, which process I have styled "ambrotype." My improved process has reference to the art of taking pictures photographically on a film of collodion upon the surface of a sheet of glass, the collodion being suitably prepared for the purpose. By the use of the said process, the beauty and permanency of such pictures are greatly increased, and I have on this account styled the process "ambrotype," from the Greek word ambrotos, immortal. ["Specification of the Patent granted to James A. Cutting, of Boston, in the United States of America, Photographer, for an Improved Process of taking Photographic Pictures upon Glass and also of Beautifying and Preserving the same. Dated London, July 26, 1854," printed in "Journal of the Franklin Institute," September 1855]

Online Etymology Dictionary, © 2010 Douglas Harper
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