There are multiple definitions:

1. ankle joint center(English)

   • HJC, KJC, OA
   • Musculoskeletal system

2. apical junctional complex(English)

   • nicotine (in electronic cigarettes) exposure disrupts airway epithelial tight junctions and increases RSV-induced barrier dysfunction
   • AJ, RSV, TEER, TJ
   • Respiratory system, Virology, Risk factor
   • https://doi.org…lung.00135.2023