Radioactive Symbol - International Ionizing Radiation Warning Sign #3893038 (License: Personal Use)

This image shows the internationally recognized ionizing radiation warning symbol, featuring a black trefoil (three-bladed propeller) on a yellow circular background. Designed in 1946 at the University of California, Berkeley, it conveys immediate hazard awareness for nuclear materials, X-ray equipment, or contaminated zones. The high-contrast colors ensure visibility and rapid recognition in safety-critical environments.

Used on signage, packaging, lab equipment, and digital interfaces where radiation hazards exist; matches user intent for safety education, regulatory compliance, or scientific illustration.