Meaning
The biohazard symbol ☣ is a three-lobed sign designed in 1966 so that biological danger would be unforgettable and hard to confuse with other warnings. It marks labs, waste, and shipments that may contain infectious materials.
People search “biohazard symbol sign” when they need the authentic character for a poster, game UI, or safety sheet. Copy ☣ (U+2623) or ☣️. It is not the radioactive trefoil ☢, and it is not a medical caduceus. Streetwear and entertainment use it as a “toxic” aesthetic; in real facilities it still means follow containment rules.
Keep the mark family-safe and factual on this site: it is a warning pictogram, not a joke about illness. If you are labeling educational slides, pair ☣ with plain-language text such as “biological hazard — authorized personnel only.” Do not use it to decorate content about real outbreaks in a way that could mislead readers about risk.
Designers sometimes confuse ☣ with recycling arrows or abstract trefoils. Check the three interlocking lobes and the open center before you publish. For radiation danger, use ☢ instead. For chemistry themes without a hazard claim, the atom ⚛ is usually clearer.
Origin
Designed in 1966 for Dow Chemical’s containment systems; later a global biological-hazard identifier used on packaging, doors, and transport labels.
Cultural variations
Official use is laboratory and waste safety. Games and movies use it for outbreak stories. Fashion use is decorative — still visually tied to danger. In journalism and education, prefer literal labeling so the audience does not treat a real warning as costume.
Frequently asked questions
What does the biohazard symbol mean?+
It warns of biological hazards such as infectious materials. The three-lobed sign was drawn to be unique and memorable.
How do I copy the biohazard sign?+
Click ☣ on this page. The emoji form is ☣️.
Is biohazard the same as radioactive?+
No. ☣ is biological hazard. ☢ is ionizing radiation. They look different and warn about different risks.
When was the biohazard symbol created?+
In 1966, for Dow Chemical containment systems, so workers could recognize biological danger at a glance.