| en | en | |
| X-ray | radiograph \ra"di*o*graph\ (r[=a]"d[i^]*[-o]*gr[a^]f), n. [Radio- + -graph.] 1. An instrument for measuring and recording solar radiation. [Webster 1913 Suppl.] 2. An image or picture produced upon a sensitive surface, as of a photographic or fluorescent plate, by some form of penetrating radiation other than light, as X-rays, beta rays, etc.; esp., a picture of the internal structure of opaque objects traversed by the rays; a skiagraph. When the picture is produced upon photographic film by X-rays, the picture is usually called an {X-ray photo} or {X-ray}. When an image is produced on photographic film by a radioactive substance in close proximity to the film, in a manner so as to record the spatial distribution of the radioactive substance, the resulting image is called an {autoradiograph} or {{autoradiogram}}. [Webster 1913 Suppl. +PJC] |
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