spectrophotometer
noun
spec·tro·pho·tom·e·ter ˌspek-trō-fə-ˈtä-mə-tər 
: a photometer for measuring the relative intensities of the light in different parts of a spectrum
spectrophotometric
ˌspek-trə-ˌfō-tə-ˈme-trik
adjective or less commonly spectrophotometrical
ˌspek-trə-ˌfō-tə-ˈme-tri-kəl
spectrophotometrically
ˌspek-trə-ˌfō-tə-ˈme-tri-k(ə-)lē
adverb 
Example Sentences
Recent Examples on the Web Female tanagers are generally much duller than their male counterparts, an observation that the researchers confirmed with a spectrophotometer, which measures how much light reflects off a surface. 
BostonGlobe.com, 21 Apr. 2021 The Broad is helping renovate some of the labs and is supplying extra equipment to help them extract and store the DNA, including freezers and NanoDrop spectrophotometers, which measure the amount of DNA in a sample. Jeanne Whalen, WSJ, 25 June 2018 These problems ranged from the robots’ arms landing in the wrong places, causing pipettes to break, to the spectrophotometers being badly misaligned. John Carreyrou, WIRED, 21 May 2018 Afterward, they are measured with a spectrophotometer, which compares colors against the Pantone standard with hyperaccuracy. Bruce Falconer, New York Times, 28 Feb. 2018 The Broad is helping renovate some of the labs and is supplying extra equipment to help them extract and store the DNA, including freezers and NanoDrop spectrophotometers, which measure the amount of DNA in a sample. Jeanne Whalen, WSJ, 25 June 2018 These problems ranged from the robots’ arms landing in the wrong places, causing pipettes to break, to the spectrophotometers being badly misaligned. John Carreyrou, WIRED, 21 May 2018 Afterward, they are measured with a spectrophotometer, which compares colors against the Pantone standard with hyperaccuracy. Bruce Falconer, New York Times, 28 Feb. 2018 Their soon-to-launch chemistry app turns the phone’s camera into a sensor so the phone can be used as a spectrophotometer or a colorimeter. Emily Matchar, Smithsonian, 7 Apr. 2017 See More
BostonGlobe.com, 21 Apr. 2021 The Broad is helping renovate some of the labs and is supplying extra equipment to help them extract and store the DNA, including freezers and NanoDrop spectrophotometers, which measure the amount of DNA in a sample. Jeanne Whalen, WSJ, 25 June 2018 These problems ranged from the robots’ arms landing in the wrong places, causing pipettes to break, to the spectrophotometers being badly misaligned. John Carreyrou, WIRED, 21 May 2018 Afterward, they are measured with a spectrophotometer, which compares colors against the Pantone standard with hyperaccuracy. Bruce Falconer, New York Times, 28 Feb. 2018 The Broad is helping renovate some of the labs and is supplying extra equipment to help them extract and store the DNA, including freezers and NanoDrop spectrophotometers, which measure the amount of DNA in a sample. Jeanne Whalen, WSJ, 25 June 2018 These problems ranged from the robots’ arms landing in the wrong places, causing pipettes to break, to the spectrophotometers being badly misaligned. John Carreyrou, WIRED, 21 May 2018 Afterward, they are measured with a spectrophotometer, which compares colors against the Pantone standard with hyperaccuracy. Bruce Falconer, New York Times, 28 Feb. 2018 Their soon-to-launch chemistry app turns the phone’s camera into a sensor so the phone can be used as a spectrophotometer or a colorimeter. Emily Matchar, Smithsonian, 7 Apr. 2017 See More Word History
Etymology
spectro- + photometer, after French spectrophotomètre or German Spectrophotometer
First Known Use
1881, in the meaning defined above
Medical Definition
spectrophotometer
noun
spec·tro·pho·tom·e·ter ˌspek-trō-fə-ˈtäm-ət-ər
: a photometer for measuring the relative intensities of the light in different parts of a spectrum