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

Medical staff are conducting tests to determine the root cause of the infection, and Aaron is receiving broad-spectrum antibiotics. —Ana Gutierrez, Austin American Statesman, 27 Jan. 2026

At its core is mineral SPF 50+ for broad-spectrum UV defense, along with niacinamide to help refine texture, allantoin to moisturize, and bisabolol to soothe and brighten. —Conçetta Ciarlo, Vogue, 23 Jan. 2026

Exfoliating acids make skin sensitive to sunlight, so be sure to wear a high-factor, broad-spectrum sunscreen during the daytime. —Jacqueline Kilikita, Refinery29, 20 Jan. 2026

Gurland, who favors Aplos, which makes spirits infused with citrus, herbal botanicals, and broad-spectrum hemp. —Andrea Strong, Bon Appetit Magazine, 30 Dec. 2025

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