“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.
Medicine201Arts and Humanities43Social Sciences38Environmental Science19Health Professions19Medicine: Medicine (General): Medical philosophy. Medical ethics1Social Sciences: Commerce: Business: Business ethics1