“A photogram is a contact print. It is made by placing something opaque or translucent on light sensitive material and then exposing it to light. This blocks out part of the light, and makes a pattern or picture on the light sensitive material when it is exposed to light and processed.”
A photogram is a photographic print made by laying objects onto photographic paper and exposing it to light.
Man Ray and Laszlo Moholy-Nagy were know for their photograms. Man Ray called the Rayographs.