“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.
Materials Science581Engineering337Pharmacology, Toxicology and Pharmaceutics261Medicine220Biochemistry, Genetics and Molecular Biology205Immunology and Microbiology175Medicine: Therapeutics. Pharmacology1