transilluminator
Noun
Meaning
transilluminator (plural transilluminators)
A device or instrument that projects light, ultraviolet radiation, etc. through a translucent sample for observation or photography
Examples
When stained with ethidium bromide, the gel is viewed with an ultraviolet (UV) transilluminator.
DNA stained with crystal violet can be viewed under natural light without the use of a UV transilluminator which is an advantage, however it may not produce a strong band.