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

Product developer and manufacturer Solésence is taking scalp care into the SPF category with Scalp Screen Dry Shampoo SPF 45+ Sunscreen, a multitasking formula that combines oil absorption with broad-spectrum UV defense. — Ryma Chikhoune, Footwear News, 21 July 2026

The ingredient, which has been used in Europe and other countries for years, provides broad-spectrum protection against both UVA and UVB rays. — Kaitlyn Harvey, AJC.com, 17 July 2026

Plus, the broad-spectrum chemical formula goes on lightweight and virtually invisible on all skin tones, with none of the sticky, greasy feeling that can make wearing body sunscreen feel like a chore. — Catharine Malzahn, Allure, 13 July 2026

Start the day with a broad-spectrum liquid or cream SPF, then use powder to top it off. — Lauren Jarvis-Gibson, Sacbee.com, 1 July 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