SKIAGRAPH
radiogram, radiograph, shadowgraph, skiagraph, skiagram
(noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)
Source: WordNet® 3.1
Noun
skiagraph (plural skiagraphs)
(physics) Alternative form of sciagraph
Verb
skiagraph (third-person singular simple present skiagraphs, present participle skiagraphing, simple past and past participle skiagraphed)
Alternative form of sciagraph
Source: Wiktionary
Ski"a*graph, n. Ski*ag"ra*phy, n., etc.
Definition: See Sciagraph, Sciagraphy, etc.
Source: Webster’s Unabridged Dictionary 1913 Edition