Skiagraph
Defined in 2 dictionaries — Cyclopedic (1922), Bouvier (1914)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
A skiagraph is not a picture of the object or substance itself, but of the shadow merely, which is cast by such object or substance. 149 111. App. 445.
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
A radiograph, which see.