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
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.
The formula gets its sunray-shielding benefits from broad-spectrum chemical UV filters, which safeguard against damage while ensuring skin remains moisturized via aloe, hyaluronic acid, and squalane. Kiana Murden, Vogue, 17 Oct. 2025 Aside from a heaping serving of broad-spectrum SPF 50, this formula delivers nourishing additives that bridge the gap between skin tint and moisturizer. Lily Wohlner, Allure, 8 Oct. 2025 Heavy occlusives can trap debris and worsen breakouts; keep textures light, focus on humectants like glycerin or hyaluronic acid, and always, always add a broad-spectrum sunscreen. Larry Stansbury, Essence, 7 Oct. 2025 Green advises following the American Academy of Dermatology’s guidance to apply a broad-spectrum, water-resistant sunscreen to your fingers and the backs of your hands before a gel manicure, or to wear a pair of opaque fingerless gloves. Holly Burns, Time, 30 Sep. 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 21 Oct. 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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