reflectometer

[ ree-flek-tom-i-ter, ri- ]
/ ˌri flɛkˈtɒm ɪ tər, rɪ- /

noun Optics.

a device for measuring reflectance.

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Origin of reflectometer

First recorded in 1890–95; reflect + -o- + -meter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for reflectometer

reflectometer
/ (ˌriːflɛkˈtɒmɪtə) /

noun

physics an instrument for measuring the ratio of the energy of a reflected wave to the incident wave in a system
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012