supercluster
su per clus ter |ˈso͞opərˌkləstər ˈsupərkləstər | ▶noun Astronomy a cluster of galaxies which themselves occur as clusters.
super |clus ¦ter |ˈsuːpəklʌstə, ˈsjuː -| ▶noun Astronomy a cluster of galaxies which themselves occur as clusters.
The Wordsmith Dictionary
The Wordsmith Dictionary