“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.
Agricultural and Biological Sciences26Medicine23Chemistry18Immunology and Microbiology15Materials Science15Physics and Astronomy15Biochemistry, Genetics and Molecular Biology14Medicine: Internal medicine: Neoplasms. Tumors. Oncology. Including cancer and carcinogens1Science: Biology (General): Genetics1Science: Chemistry: Organic chemistry: Biochemistry1