[bac.cha.nal] n [L, shrine of Bacchus, prob. back-formation fr. Bacchanalia] (1550) 1: orgy 2, 3
2. a: a devotee of Bacchus; esp: one who celebrates the Bacchanalia b: reveler
[2]bac.cha.nal adj (1550): of, relating to, or suggestive of the Bacchanalia: bacchanalian