shadowgraph
Concise Oxford English Dictionary © 2008 Oxford University Press:
shadowgraph/ˈʃadəʊɡrɑːf/
▶noun
- 1 an image formed by the shadow of an object on a surface.
- 2 an image formed when light shone through a fluid is refracted differently by regions of different density.
- 3 a radiograph.
'shadowgraph' also found in these Oxford entries:

