“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.
Subject classification
Agricultural and Biological Sciences88Pharmacology, Toxicology and Pharmaceutics77Chemistry47Materials Science42Medicine: Pharmacy and materia medica1