“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.
Medicine359Physics and Astronomy322Engineering268Energy162Medicine: Medicine (General): Medical physics. Medical radiology. Nuclear medicine1Science: Physics: Nuclear and particle physics. Atomic energy. Radioactivity: Radioactivity and radioactive substances1