1. (noun)patella, kneecap, kneepan a small flat triangular bone in front of the knee that protects the knee joint Synonyms: genus Patella, kneecap, patella, kneepan
2. (noun)Patella, genus Patella type genus of the family Patellidae: common European limpets Synonyms: genus Patella, kneecap, kneepan