Biohazard Sign ☣ emoji code is 2623 in symbols category.
Emoji Meaning: Biohazard Sign 
What does ☣ mean? Biohazard sign is the official unicode name to describe the meaning of this emoji. The Biohazard 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.