NFPA symbol

NFPA sym·bol

The National Fire Protection Agency (NFPA) label displays warnings for firefighters of the location of hazardous materials in the event of a fire. It includes a diamond-shaped symbol with four quadrants that indicate the relative danger level in four different areas: health (blue), fire (red), chemical stability (yellow), and other specific hazard types.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012