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Radiation Warning Symbol - Meaning, History, and Safety Guidelines #1806371 (License: Personal Use)

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International radiation hazard symbol with black trefoil on yellow background.

About this clipart

This image displays the internationally recognized radiation warning symbol (ISO 361), featuring a black trefoil on a yellow circular background with a central black circle. Designed in 1946 at the University of California, Berkeley, it conveys immediate danger from ionizing radiation and is standardized by ISO and IAEA for consistent hazard communication. The high-contrast colors ensure visibility and recognition across languages and contexts.
Used on signage, packaging, equipment, and facilities handling radioactive substances; appears in nuclear energy, medical imaging, industrial radiography, and emergency response contexts. Matches user intent for safety education, regulatory compliance, or hazard identification research.
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Related Cliparts: Learn about the universal radiation hazard symbol: its design, purpose, history, and how it’s used to warn of ionizing radiation risks worldwide.

(view all Radiation Warning Symbol - Meaning, History, and Safety Guidelines)

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