What does "retrogressive" mean?
Retrogressive: (Biol.) Passing from a higher to a lower condition; declining from a more perfect state of organization; regressive.
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00