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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This lightweight, silky formula pairs broad-spectrum sun protection with antioxidant-rich white tea to help fend off free radicals and environmental stressors that can accelerate visible aging. Christa Joanna Lee, Allure, 12 Sep. 2025 To ensure pollination, plant trees in guilds and avoid broad-spectrum synthetic pesticides. Lauren Landers, Better Homes & Gardens, 2 Sep. 2025 While formulations vary, the general rule is to select a broad-spectrum shield with a sun protection factor (SPF) of 30. Khanh T.l. Tran, USA Today, 29 Aug. 2025 These proteins are primarily responsible for broad-spectrum antiviral protection. Pranjal Malewar, New Atlas, 27 Aug. 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 16 Sep. 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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