illuminometer

[ ih-loo-muh-nom-i-ter ]

noun

1. an instrument for measuring illumination.

Word History and Origins

Origin of illuminometer¹

First recorded in 1890–95; illumin(ation) + -o- + -meter

Example Sentences

Godfrey uses a tool called an illuminometer to show if there’s any remaining germs on surfaces once the spray is complete.

From Washington Times