What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
Man Ray's term for: a type of photographic picture produced without a camera by arranging objects on light-sensitive paper which is then exposed and developed.
1930s. From the name of Man Ray (born Emmanuel Radnitzky), U.S. artist and photographer + -o- + -graph, after French rayographe.