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 Microsoft

Category Symbols

Subcategory warning

Unicode Version 6.0

Emoji Version 1.0

License MIT

Microsoft Fluent License

Emoji graphics by Microsoft. © Microsoft Corporation. Licensed under MIT. Excludes assets such as Clippy, flags, and trademarks.

Microsoft Fluent Emoji assets are licensed under the MIT License. Certain assets—such as Clippy, country flags, and Microsoft product/brand trademarks—are excluded from this license and may not be used without separate permission.

MIT License Fluent Emoji Repository