ambrotype

[am-bruh-tahyp]
noun Photography.
an early type of photograph, made by placing a glass negative against a dark background.

Origin:
1850–55, Americanism; < Greek ámbro(tos) immortal (see ambrosia) + -type

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World English Dictionary
ambrotype (ˈæmbrəʊˌtaɪp)
 
n
photog an early type of glass negative that could be made to appear as a positive by backing it with black varnish or paper
 
[C19: from Greek ambrotos immortal + -type; see ambrosia]

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Etymonline
Word Origin & History

ambrotype
1855, Amer.Eng., perhaps from amber, with reference to its property of preserving life forms or its color, or from Gk. ambrotos "immortal, imperishable" (see ambrosia). A type of photograph on glass with lights given by silver and shades by a dark background showing through.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The ambrotype was less expensive to make than a daguerreotype.
Original photograph: an ambrotype now known through copy prints.
Images for ambrotype
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