The phrase "material universe" refers to everything that exists in the physical world. It includes all the objects, matter, energy, and living things that can be observed and measured. Full definition
«What kind of other particles can be hidden in the infinite variety of material universes? (sciencedaily.com)
i made a statement: all the things that exist (including the immaterial thoughts and ideas of humans)-- exist within this very material universe. (religion.blogs.cnn.com)
This near - zero value, which Einstein referred to as the Cosmological Constant, implies that the balance between energy contributions from different fields related to fundamental universal forces somehow got sorted out well enough that we ended up with a fairly stable material universe. (sciencedaily.com)