grease-spot photometer

noun

Definition of grease-spot photometer

: a photometer in which a grease spot on a piece of paper becomes invisible when a light on each side of the paper illuminates the spot equally

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Cite this Entry

“Grease-spot photometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/grease-spot%20photometer. Accessed 15 Aug. 2020.

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