broad-spectrum

adjective

broad-spec·​trum ˈbrȯd-ˈspek-trəm 

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

Up to 80 percent of visible facial aging is attributable to cumulative unprotected UV exposure, per a 2013 study in Clinical, Cosmetic and Investigational Dermatology, which makes daily broad-spectrum SPF 30 or higher the single highest-impact product in any routine. —Allison Palmer updated June 13, Fort Worth Star-Telegram, 13 June 2026

Those positives contrast with mineral sunscreens, which rely on the broad-spectrum filters zinc oxide or titanium dioxide and can leave a chalky white cast on the skin. —Danielle Zickl, Health, 12 June 2026

Bemotrizinol is a powerful, broad-spectrum blocker of dangerous rays that has been used in Europe and other parts of the world for years, but manufacturers have not been able to use it in American formulations until now. —Veronique Greenwood, Time, 9 June 2026

Recommendations included requiring sunscreen manufacturers to clearly label their products with active ingredients on the front, as well as clearer formats for SPF, broad-spectrum and water-resistant statements. —Sandee Lamotte, CNN Money, 9 June 2026

Word History

First Known Use

1950, in the meaning defined at sense 1

Rhymes for broad-spectrum

• electrum
• spectrum

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