This trefoil is the hazard symbol for radioactive material. For the lab coats.
What the hazardous materials sign really means.
Buy Symbols - Hazard warnings by ecelop on GraphicRiver.
Buy New and Old Hazard Symbols by ecelop on GraphicRiver. New and Old Hazard symbols
Floral Skull Ladies Junior Fit V-neck T-shirt, Liquid Blue Dia De Muertos Floral Sugar Skull Design
Orange Nuclear Hazard Symbol Stripe Shift Knob with x 15 Insert