[re.gres.sive] adj (1634) 1: tending to regress or produce regression
2: being, characterized by, or developing in the course of an evolutionary process involving increasing simplification of bodily structure
3: decreasing in rate as the base increases "a ~ tax" -- re.gres.sive.ly adv -- re.gres.sive.ness n -- re.gres.siv.i.ty n