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Dictionary


ret•ro•gres•sion



Pronunciation: (re"tru-gresh'un), [key]
n.
1. the act of retrogressing; movement backward.
2. Biol.degeneration; retrograde metamorphosis; passing from a more complex to a simpler structure.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

retrogressretrogressive
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