“2-yr mean citedness” is the OpenAlex field summary_stats.2yr_mean_citedness (CC0): mean citations per paper over a two-year window. It is a raw bibliometric field, not a journal rating, and is not used for default ranking.
Medicine87Arts and Humanities83Biochemistry, Genetics and Molecular Biology63Agricultural and Biological Sciences55Pharmacology, Toxicology and Pharmaceutics51Social Sciences39Medicine: Public aspects of medicine1