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retrorse
retrospect
retrospective
retrosynthetic
retrotransposon
retroussé
retroversion
retrovirus
retry
retsina
Rett syndrome
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retrogress
ret·ro·gress [ rèttrō gréss ] (past and past participle ret·ro·gressed, present participle ret·ro·gress·ing, 3rd person present singular ret·ro·gress·es)


intransitive verb 
Definition:
 
1. revert or degenerate: to return to an earlier and usually worse condition
2. go backward: to move or travel backward
3. biology have less complex features: to show or develop the less complex features of simpler organisms
[Early 19th century. <retro- after progress]

ret·ro·gres·sive adjective
ret·ro·gres·sive·ly adverb
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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