1. a place where something originates, develops, or is located
Usage: formal
2. a place where bacteria or other microorganisms lodge and multiply
Usage: medical
3. a nest, especially of a bird or insect
Usage: biology; formal

Examples

• The old building became a nidus of criminal activity.
• Doctors identified the infected tissue as a nidus for bacterial growth.
• The research team discovered a nidus of innovation in the university lab.
• Poor dental hygiene can create a nidus for harmful bacteria.
• The abandoned lot served as a nidus for various social problems.
• Scientists studied the nidus where the birds built their colony.
• The wound became a nidus of infection despite treatment.