|exemplifying most nearly the essential characteristics of a higher group in natural history, and forming the type|
|a theory that evolution of a species is due to a predetermined series of alterations intrinsic to the species, not due to natural selection|
|1.||regressing or tending to regress|
|2.||See progressive (of a tax or tax system) levied or graduated so that the rate decreases as the amount taxed increases|
|3.||of, relating to, or characteristic of regression|
regressive re·gres·sive (rĭ-grěs'ĭv)
Having a tendency to return or to revert.
Characterized by regression.