[re-truh-gresh-uh n]


the act of retrogressing; movement backward.
Biology. degeneration; retrograde metamorphosis; passing from a more complex to a simpler structure.

Origin of retrogression

1640–50; < Latin retrōgress(us) (see retrogress) + -ion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for retrogression

Historical Examples of retrogression

Word Origin and History for retrogression

1640s, noun of action, formed on model of progression, from Latin retrogressus, past participle of retrogradi "move backward" (see retrograde).

Online Etymology Dictionary, © 2010 Douglas Harper

retrogression in Medicine




The act or process of deteriorating or declining.
A return to a less complex biological state or stage.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.