photometer[fō täm′ət ər]
photometer definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an instrument used in measuring the intensity of light, esp. in determining its relative intensity from different sources
Origin: photo- plush -meter
photometer definition by American Heritage Dictionary
An instrument for measuring a property of light, especially luminous intensity or flux.