“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.
Biochemistry, Genetics and Molecular Biology338Environmental Science317Pharmacology, Toxicology and Pharmaceutics198Immunology and Microbiology192Medicine167Medicine: Public aspects of medicine: Toxicology. Poisons1