What is a dirty bomb as fears grow over its possible use by Iran amid war?

A dirty bomb, or radioactive dispersal device, is a mixture of conventional explosives and radioactive substances. Unlike a nuclear weapon, it causes limited physical damage but spreads contamination, NewsX reported. Often delivered via vehicles, drones, or missiles, it's termed a weapon of mass disruption. The presence of enriched uranium in Iran has raised concerns over its potential misuse.