retrogressive

retrogressive is defined in Webster's Unabridged Dictionary (1913) with 1 sense. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.(Biol.) Passing from a higher to a lower condition; declining from a more perfect state of organization; regressive.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

Related questions

Reverse-dictionary questions

Definition-first questions whose answer is retrogressive.

Sources