∞ generated and posted on 2016.09.02 ∞
Major taxonomic unit found immediately above the level of class.
As listed in descending hierarchical order (from more inclusive to less inclusive):
Domain > Kingdom > Phylum > Class > Order > Family > Genus > Species
where ">" implies larger than in terms of what species are contained within a given taxonomic category.
Taxonomic category mnemonics can be found here.
See, e.g., animal phyla.