What is the origin of the name "degeneracy" pressure and "degenerate" Fermi gas? I was trying to find the first paper that used the term "degenerate/degeneracy" to describe either "degeneracy" pressure or "degenerate" Fermi gas. But I failed to do so. Any help is highly appreciated!
Edit: I want to know if there is a reason why people call it degeneracy here. As an example, the "canonical" in the canonical quantization and canonical ensemble are two distinct physics meanings at first glance. But if we think more carefully, both are the adjectives that mean "the standard way". So, I was wondering if something is "degenerate" in this context. Is that because they are approaching a single multi-particle ground state with zero entropy?