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.
NanoViricides, a nano-biopharmaceutical company, received approval from the Food and Drug Administration in May to continue development of a broad-spectrum antiviral candidate for measles treatment. — Janet Loehrke, USA Today, 25 Aug. 2026 In addition to creating a smooth base for makeup, the formula delivers broad-spectrum sun protection—a welcome bonus for mature skin, since UV exposure is one of the primary drivers of visible signs of aging. — Jenny Berg, InStyle, 19 Aug. 2026 Sun protection and skin care For children 6 months and older, apply broad-spectrum sunscreen. — Oc Register, 11 Aug. 2026 Along with texture, thoughtfully selecting skin-care-forward ingredients that could seamlessly coexist with complexion coverage and broad-spectrum sun protection was just as essential. — Conçetta Ciarlo, Vogue, 30 July 2026 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

Rhymes for broad-spectrum

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Browse Nearby Words

broad sole
broad-spectrum
broad-spoken
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Cite this Entry

“Broad-spectrum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/broad-spectrum. Accessed 1 Sep. 2026.

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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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