: the reflective quality or power of a surface or material
… conducting "reflectivity tests" to see whether Saudi sand when viewed through the goggles creates a sparkling effect that disorients pilots and causes them to send their helicopters careening to the ground.Newsweek
… there are many examples of luster-decorated ceramics, in which Islamic potters emulated the reflectivity of metalwork by applying metal oxides to white-glazed vessels …Roberta Smith
The warming at the surface could be expected to melt snow and ice, reducing the earth's albedo, or reflectivity.Roger Revelle

Examples of reflectivity in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This could be accomplished by spraying sea salt in the lower atmosphere to increase the reflectivity of clouds over the ocean. Thomas G. Moukawsher, MSNBC Newsweek, 25 Apr. 2025 Moreover, since the sensor head does not contain a metal antenna, detectability from side-channel leakage and radar reflectivity is minimized. Paul Lipman, Forbes.com, 4 Apr. 2025 As 2016 research from Personality and Individual Differences explains, cognitive styles fall on a broad spectrum: Impulsivity vs. reflectivity. Mark Travers, Forbes, 23 Mar. 2025 For Snow Goose, Ackermann created youthful silhouettes and a bold color palette, including the Rider parka which blends oversized proportions with hits of reflectivity, utilitarian pockets, a cinchable waist and side zips. David Moin, WWD, 6 Feb. 2025 See All Example Sentences for reflectivity

Word History

First Known Use

1879, in the meaning defined above

Time Traveler
The first known use of reflectivity was in 1879

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Cite this Entry

“Reflectivity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reflectivity. Accessed 30 Apr. 2025.

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