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

To ensure pollination, plant trees in guilds and avoid broad-spectrum synthetic pesticides. —Lauren Landers, Better Homes & Gardens, 2 Sep. 2025

While formulations vary, the general rule is to select a broad-spectrum shield with a sun protection factor (SPF) of 30. —Khanh T.l. Tran, USA Today, 29 Aug. 2025

These proteins are primarily responsible for broad-spectrum antiviral protection. —Pranjal Malewar, New Atlas, 27 Aug. 2025

My boss at the time recommended the Murad Environmental Shield City Skin SPF, a 100 percent mineral sunscreen that offers broad-spectrum sun protection, plus defense against blue light and pollution—two environmental stressors that can accelerate skin aging and worsen breakouts. —Annita Katee, Travel + Leisure, 22 Aug. 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