Webster’s Revised Unabridged Dictionary · 1913
Radiograph
Ra′di·o·graph, n. [Radio- + -graph.] 1. An instrument for measuring and recording solar radiation.
2. An image or picture produced upon a sensitive surface, as of a photographic plate, by some form of radiation other than light, as the Röntgen rays, radium rays, etc.; esp., a picture of opaque objects traversed by the rays; a skiagraph.
Ra′di·o·graph, v. t. To make a radiograph of. — Ra′di·og′ra·pher (#), n.