vagi·nal I. \ˈvajənəl, vəˈjīnəl\adjective Etymology: New Latin vaginalis, from Latin vagina + -alis -al 1.: of, relating to, or resembling a vagina : thecal < a vaginal synovial membrane surrounding a tendon > < the vaginal branches of the hepatic artery > 2.: of, relating to, or affecting the vagina of the genital canal < the vaginal plexus of nerves or veins > II. noun (-s) : a vaginal artery or muscle