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Answer for the clue "A photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) ", 11 letters:
shadowgraph

Word definitions for shadowgraph in dictionaries

WordNet Word definitions in WordNet
n. a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) [syn: radiogram , radiograph , skiagraph , skiagram ]

Wiktionary Word definitions in Wiktionary
n. 1 A shadow-picture; a radiograph or X-ray photograph; a sciagram. 2 (context physics English) An optical technique of visualizing patterns of fluid flow by using differences in refractive index vb. 1 (context transitive English) To outline in a shadow-picture ...

Wikipedia Word definitions in Wikipedia
Shadowgraph is an optical method that reveals non-uniformities in transparent media like air, water, or glass. It is related to, but simpler than, the schlieren and schlieren photography methods that perform a similar function. Shadowgraph is a type of ...

Usage examples of shadowgraph.

I have done foolishly to dwell With Fear upon her desert isle, To take my shadowgraph to Hell, And then to hope the shades would smile.

His voice joined other shouts and the screeching of the gulls in the smoke and dust and he gradually began to discern crouched figures, like a shadowgraph in slow motion.

His hands, silhouetted against the swiftly rising flame of the wick to which he had now transferred the match flame, were like shadows thrown upon a sheet in some sort of shadowgraph game.