Radioactive ☢
Copy & Meaning

A radioactive symbol — the trefoil sign representing ionizing radiation, nuclear energy, and radiological hazards that are invisible to human senses but potentially dangerous at certain exposure levels. This symbol appears wherever radioactive materials are present or used — nuclear power plants, medical imaging facilities, research laboratories, and radioactive waste storage. Nuclear energy's promise and dangers have defined political debates since the 1950s.

Chernobyl and Fukushima made this symbol internationally associated with catastrophic risk. Used for nuclear energy discussions, radiation safety content, medical imaging contexts, the historical and ongoing debates about nuclear power and weapons, and any expression of invisible but serious environmental or health hazards.