luminometer
noun
lu·mi·nom·e·ter
ˌlü-mə-ˈnäm-ət-ər 
: a sensitive photometer used for measuring very low light levels (as those produced in a luminescent process)
Cite this Entry
“Luminometer.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/luminometer. Accessed 30 Oct. 2025.
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