“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 Science182Medicine153Pharmacology, Toxicology and Pharmaceutics100Biochemistry, Genetics and Molecular Biology81Engineering78Medicine: Therapeutics. Pharmacology1Technology: Chemical technology: Biotechnology1Technology: Chemical technology: Chemical engineering1