Radioactive Emoji
The trefoil warning for ionising radiation, in use since the 1940s.
Try Radioactive emoji
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Meaning & usage
What does the Radioactive emoji mean?
The trefoil warning for ionising radiation, in use since the 1940s.
Ominous and hyperbolic. Outside genuine hazard contexts it exaggerates how bad something is, and the borrowed authority of a real warning sign is what makes the joke work.
How to use ☢️ naturally
Hazard references, nuclear topics and hyperbole about something toxic.
Reaction symbols work like visual emphasis: they reinforce a word, rate an idea or replace a short response. Repetition normally increases intensity, but it can also make a message feel more performative.
From standard to slang
The history of ☢️
- 2015
First defined as emoji
According to Unicode’s Emoji Versions data, Radioactive was first defined as emoji in Emoji 1.0, dated 2015. The first release where Unicode versioned the emoji set as a standard in its own right.
- Before the keyboard
Its visual roots
The trefoil, designed at Berkeley in 1946 and drawn as blades radiating from a central point. It has meant ionising radiation ever since.
- Today
How its use evolved
Hazard references, nuclear topics and hyperbole about something toxic.
Dates follow Unicode’s official Emoji Versions chart. Versions before Emoji 1.0 are labelled retrospectively. See the history of emoji.
In conversation
Examples of ☢️ in messages
These examples show the emoji in complete messages, where the words make its intended tone easier to read.
The office microwave is a crime scene ☢️
Documentary about the exclusion zone was extraordinary ☢️
Whatever is in that jar has evolved ☢️
When to use it
Using ☢️ clearly
Hazard references, nuclear topics and hyperbole about something toxic. It lands as radioactive emoji or ☢️ meaning when the rest of the message supports that reading, and it is the surrounding words that do the deciding — so in a sensitive, professional or cross-cultural conversation, say the thing outright as well.
Common questions
About the radioactive emoji
What does ☢️ mean in a text message?
The trefoil warning for ionising radiation, in use since the 1940s. Ominous and hyperbolic. Outside genuine hazard contexts it exaggerates how bad something is, and the borrowed authority of a real warning sign is what makes the joke work.
Is ☢️ always positive?
Not always. Its usual readings are radioactive emoji, ☢️ meaning, radiation symbol, and irony or the relationship between the people can flip any of them.
Why does ☢️ look different on another device?
U+2622 U+FE0F identifies the emoji; the picture is a font, drawn separately by Apple, Google, Microsoft and Samsung. Only the artwork changes, never the character.
How do I copy and paste the radioactive emoji?
Use the copy button at the top of this page. ☢️ is a character, not an image, so it pastes into messages, captions and filenames as ordinary text.
When was the radioactive emoji introduced?
Unicode’s Emoji Versions data first records ☢️ as emoji in Emoji 1.0, dated 2015. Early emoji version numbers can be retrospective, so this date describes its place in the standardised emoji set rather than the first-ever appearance of the underlying symbol.
Easily confused
☢️ compared with similar emoji
These sit close enough in meaning that people reach for the wrong one. Here is what actually separates them.
Radioactive or Biohazard?
☢️ warns about radiation; ☣️ warns about living things. Both are real safety symbols, and swapping them changes the claim entirely.
Radioactive or Warning?
⚠️ is general caution. ☢️ names a specific hazard, which is what makes it funnier as hyperbole and less useful as an actual warning.
For developers
☢️ in code
Every value below is generated from the character itself, so it stays correct even where a file encoding cannot hold the emoji directly.
| Format | Value | When to use it | Copy |
|---|---|---|---|
| Unicode | U+2622 U+FE0F | The standard reference. Use it to search a character map or a spec. | |
| HTML (hex) | ☢️ | For HTML and XML. Safe in files that are not saved as UTF-8. | |
| HTML (decimal) | ☢️ | The same reference in decimal. Both render identically. | |
| CSS | \2622 \FE0F | For the content property. Keep the quotes around the whole value. | |
| JavaScript | \u{2622}\u{FE0F} | A string-literal escape. Needs the u flag inside a regular expression. | |
| URL-encoded | %E2%98%A2%EF%B8%8F | Percent-encoded UTF-8, for query strings and API requests. |
Reference card
Emoji details
- Unicode
- U+2622 U+FE0F
- Category
- Symbols & Reactions
- Also known as
- radioactive emoji☢️ meaningradiation symbol
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