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

Choose one that offers broad-spectrum protection from both UVB and UVA rays — both can cause skin cancer and visible signs of aging. —Kelle Walsh, NPR, 18 June 2026

In addition, applying broad-spectrum SPF 30+ sunscreen 15 to 20 minutes before sun exposure, ensuring adequate coverage, and reapplying every 90 minutes can help protect the skin from overheating and potential sunburn. —Maggie O'Neill, Verywell Health, 18 June 2026

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

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