One of the mysteries of the English language finally explained.
Photography using X-rays; = "radiography";.
1The transmission of photographs by means of radio. Now rare.
2Astronomy. The generation of images representing the spatial distribution of radio-frequency radiation; photography using radio waves in place of light waves.
Late 19th century; earliest use found in Chemical News. From radio- + photography, after French radiophotographie<br>early 20th century; earliest use found in Wireless World. From radio- + photography.
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