[ spek-troh-foh-tom-i-ter ]
/ ˌspɛk troʊ foʊˈtɒm ɪ tər /


an instrument for making photometric comparisons between parts of spectra.

Origin of spectrophotometer

First recorded in 1880–85; spectro- + photometer

OTHER WORDS FROM spectrophotometer

spec·tro·pho·to·met·ric [spek-troh-foh-tuh-me-trik] /ˌspɛk troʊˌfoʊ təˈmɛ trɪk/, adjectivespec·tro·pho·to·met·ri·cal·ly, adverbspec·tro·pho·tom·e·try, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for spectrophotometry

/ (ˌspɛktrəʊfəʊˈtɒmɪtə) /


an instrument for producing or recording a spectrum and measuring the photometric intensity of each wavelength present, esp such an instrument used for infrared, visible, and ultraviolet radiationSee also spectrometer

Derived forms of spectrophotometer

spectrophotometric (ˌspɛktrəʊˌfəʊtəˈmɛtrɪk), adjectivespectrophotometry, noun

Word Origin for spectrophotometer

C19: from spectro- + photo- + -meter
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

Medicine definitions for spectrophotometry

[ spĕk′trō-fō-tŏmĭ-tər ]


An instrument for measuring the intensity of light of a definite wavelength transmitted by a substance or a solution, thus providing a measure of the amount of material in the solution absorbing the light.

Other words from spectrophotometer

spec′tro•pho′to•metric (-fō′tə-mĕtrĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.