Webster's English Dictionarypanacea n. [L., fr. Gr. pana`keia fr. panakh`s all-healing; pa^s pa^n, all + 'akei^sqai to heal.] () 1. A remedy for all diseases; a universal medicine; a cure-all; catholicon; hence, a relief or solace for affliction. () 2. (Bot.) The herb allheal. ()