supercluster

/ˈsupərˌklʌstər/
noun
  1. A very large group of galaxies or galaxy clusters, bound together by gravity, forming one of the largest structures in the universe.
    • Our supercluster stretches across hundreds of millions of light-years.
    • Astronomers discovered a new supercluster containing thousands of galaxies.
    • The Milky Way is part of a supercluster called Laniakea.
  2. Any very large cluster or grouping of similar things, especially in a scientific or technical context.
    • The data center is a supercluster of thousands of interconnected computers.
    • In biology, a supercluster of genes can influence many traits at once.
    • The city's tech companies form a supercluster of innovation and talent.