rotograph
Definition of rotograph
: a photographic white-on-black print (as of a manuscript or book) made directly on bromide paper by the use of a reversing prism without a negative
From the M-W Editors
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Origin and Etymology of rotograph
roto- + -graph
rotograph
Definition of rotograph
-ed/-ing/-s
: to make a rotograph of
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First Known Use of rotograph
1911
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