from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The act or process of deteriorating or declining.
- n. Biology A return to a less complex or more primitive state or stage.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A deterioration or decline to a previous state
- n. A return to a less complex condition
from the GNU version of the Collaborative International Dictionary of English
- n. The act of retrograding, or going backward; retrogradation.
- n. Backward development; a passing from a higher to a lower state of organization or structure, as when an animal, approaching maturity, becomes less highly organized than would be expected from its earlier stages or known relationship. Called also retrograde development, and regressive metamorphism.
from The Century Dictionary and Cyclopedia
- n. The act of going backward; retrogradation.
- n. In astronomy, same as retrogradation.
- n. In biology, backward development; degeneration; retrograde metamorphosis.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. returning to a former state
- n. passing from a more complex to a simpler biological form
Sorry, no etymologies found.
Though a retrogression is over this year as well as people had some -! more tim e to regulate their spending as well as selling habits, Black Friday 2009 will not be so big.
This system of neumes was in some ways a retrogression from the Greek letter system, for the neumes indicated neither definite pitches nor definite tone-lengths.
28 The rigidity with which London makes Fang's progression to civilization adhere to Buck's retrogression is intriguing, if unoriginal in the philosophical mishmash that serves as a backdrop to the episodes.
Page 150, Volume 4 makes a strong attack on the idea of retrogression in his Methodus (pp. 308-407).
In some few cases there has been what we must call retrogression of organization.
In some few cases there has been what we must call retrogression of organisation.
Natural science calls retrogression of species, which shows signs of a former state already overcome, atavism.
This tendency, called retrogression, has never been observed to fail, as it should, in order to free the new strain from the links with the average, while new species and new varieties are seen to be quite free from their ancestors and not linked to them by intermediates.
Act. That means that states covered by Section 5 of the Act, which includes most jurisdictions in the South, must take race into account in redistricting to make sure that they do not enact plans that cause a "retrogression" in minority voting rights.
What, indeed, becomes of the nitrogen is a mystery; but it is highly probable that some such kind of retrogression as that above referred to, whereby the nitrogen is converted into some inert organic form, takes place.