photometer Hear it!

photometer definition

pho·tom·eter (fō täm′ət ər)

noun

an instrument used in measuring the intensity of light, esp. in determining its relative intensity from different sources

Etymology: photo- + -meter

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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