broad-spectrum

adjective

broad-spec·​trum ˈbrȯd-ˈspek-trəm How to pronounce broad-spectrum (audio)
1
: effective against a wide range of organisms (such as insects or bacteria)
a broad-spectrum antibiotic
2
: effective in protecting skin from ultraviolet radiation by absorbing or blocking both UVA and UVB rays
broad-spectrum sunscreens

Examples of broad-spectrum in a Sentence

Recent Examples on the Web
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Alternatively, some adults (and less commonly, children) may undergo a 10-day regimen of broad-spectrum antibiotics. Brandi Jones, Health, 17 May 2025 Wear a broad-spectrum, SPF 30 or higher water-resistant sunblock every day. Ann Pietrangelo, Verywell Health, 16 May 2025 Seven years and several Allure Readers' Choice Awards later, this broad-spectrum SPF gel (now in SPF 50) continues to be a staple in our routines. Sophia Panych, Allure, 15 May 2025 As for which type of SPF to use, Dr. Berry says to use a broad-spectrum sunscreen that protects from both UVA and UVB rays. Lydia Price, Travel + Leisure, 13 May 2025 See All Example Sentences for broad-spectrum

Word History

First Known Use

1950, in the meaning defined at sense 1

Time Traveler
The first known use of broad-spectrum was in 1950

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Cite this Entry

“Broad-spectrum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/broad-spectrum. Accessed 30 May. 2025.

Medical Definition

broad-spectrum

adjective
1
: effective against a wide range of organisms (as insects or bacteria)
broad-spectrum antibiotics
compare narrow-spectrum
2
: effective in protecting skin from ultraviolet radiation by absorbing or blocking both UVA and UVB rays
broad-spectrum suncreen
Last Updated: - Updated example sentences
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