“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.
Pharmacology, Toxicology and Pharmaceutics24Agricultural and Biological Sciences20Biochemistry, Genetics and Molecular Biology17Environmental Science16Chemistry14Immunology and Microbiology14Materials Science13Science: Science (General)1