"Cluster bombs" refers to a type of weapon that contains many smaller explosive devices within it. When the bomb is dropped or launched, it releases these smaller bombs over a wide area, creating a cluster of explosions. Full definition
My pieces since 2008 on the notion of a «population cluster bomb» go into more depth. (dotearth.blogs.nytimes.com)
That is, population cluster bombs have been exploding. (earthsky.org)
Ole, engaged to Anna, remains resilient with sounds of cluster bombs outside of a Syrian apartment, but serenades his bride - to - be with a piano tune inside their Paris apartment. (slantmagazine.com)