A biohazard warning; signals biological danger or contamination.
biohazard
☣️biohazard
Definitions & examples
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A radiation warning; indicates radioactive materials or hazards.
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A no-littering sign; throw trash in bins and keep the area clean.
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litter in bin sign
A litter bin sign; means throw trash in the bin and keep the area clean.
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police car light
Emergency alert—urgent news, alarms, or something serious.