Radioactive Emoji

Symbols

A bold, black trefoil hazard icon centered inside a yellow or black warning sign. This mark identifies areas or materials that emit ionizing radiation, signaling a serious health risk to anyone nearby.

Usage Context

Widely used to communicate danger, toxicity, or a 'stay away' warning in digital conversation. People often use it to joke about toxic situations, stressful environments, or even when describing spicy food, frequently paired with the ☣ biohazard sign or the ⚠️ warning sign.

History

The trefoil design was developed at the University of California, Berkeley, in 1946. It was chosen because it was easy to draw and clearly distinct from other warning signs, eventually becoming the global standard for identifying radiation hazards in industrial and scientific settings.

Details

Glyph

☢

Unicode

U+2622

Shortcode

:emoji_u2622:

HTML Entity

☢

Specifications

Vendor Google

Category Symbols

Subcategory warning

Unicode Version 6.0

Emoji Version 1.0

License CC-BY 4.0

Google Noto License

Emoji graphics by Twitter/X, licensed under CC-BY 4.0

Noto Color Emoji graphics are copyrighted by Google Inc. and licensed under the Apache License, Version 2.0. Font files may also be subject to the SIL Open Font License, Version 1.1.

Apache 2.0 SIL OFL 1.1 Noto Repository