1. a biological substance that poses a threat to the health of living organisms or the environment

Examples

• The laboratory was sealed off due to a biohazard leak.
• Medical waste must be disposed of in special biohazard containers.
• Scientists wear protective suits when handling biohazard materials.
• The biohazard symbol warns people of dangerous biological substances.
• Hospital staff received training on biohazard safety procedures.
• The cleanup crew specialized in biohazard contamination removal.