Radioactive Sign ☢ emoji code is 2622 in symbols category.
Emoji Meaning: Radioactive Sign 
What does ☢ mean? Radioactive sign is the official unicode name to describe the meaning of this emoji. The Radioactive sign emoji is a special symbol that can be used on smartphones, tablets, and computers. Your device needs to support this particular emoji in order for you to be able to use it, otherwise the emoji may not appear.