UVC

noun

ˌyü-(ˌ)vē-ˈsē 

: radiation that is in the region of the ultraviolet spectrum which extends from about 200 to 280 nm in wavelength and that is more hazardous than UVB but is mostly absorbed by earth's upper atmosphere

Examples of UVC in a Sentence

Recent Examples on the Web

Researchers developed LEDs that emit UVC at wavelengths below 235 nm, which is also absorbed by the outer, non-living layers of the skin. — Ameya Paleja, Interesting Engineering, 1 Oct. 2026

Other venture capital firms including Plural, UVC Partners, Balderton and Cherry Ventures also participated. — Kai Nicol-Schwarz, CNBC, 7 July 2026

The sun also emits two other types of UV light – UVC (200-280 nm) and vacuum UV (100-200 nm) – but these are stopped by the atmosphere, so sunscreens do not typically need to be able to block them. — Guy German, Fortune, 21 June 2026

The connection is used for data transfer (at up to 10Gbps) and webcam streaming via the UAC/UVC standard. — PCMAG, 14 Mar. 2025

Word History

First Known Use

1978, in the meaning defined above

Medical Definition

UVC

noun

-ˈsē 

: radiation that is in the region of the ultraviolet spectrum which extends from about 200 to 280 nm in wavelength and that is more hazardous than UVB but is mostly absorbed by the earth's upper atmosphere