| retraction | (noun) the act of pulling or holding or drawing a part back | - |
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| (noun) a disavowal or taking back of a previous assertion | Synonyms: abjuration, recantation |
| retractor | (noun) surgical instrument that holds back the edges of a surgical incision | - |
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| retraining | (noun) training for a new occupation | - |
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| retread | (noun) a used automobile tire that has been remolded to give it new treads | Synonyms: recap |
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| retreat | (noun) (military) withdrawal of troops to a more favorable position to escape the enemy's superior forces or after a defeat | - |
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| (noun) withdrawal for prayer and study and meditation | Synonyms: retirement |
| (noun) the act of withdrawing or going backward (especially to escape something hazardous or unpleasant) | - |
| (noun) an area where you can be alone | Synonyms: hideaway |
| (noun) (military) a bugle call signaling the lowering of the flag at sunset | - |
| (noun) (military) a signal to begin a withdrawal from a dangerous position | - |
| (noun) a place of privacy; a place affording peace and quiet | - |
| retreatant | (noun) a participant in a religious retreat | - |
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| retreated | (noun) people who have retreated | - |
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| retrenchment | (noun) the reduction of expenditures in order to become financially stable | Synonyms: curtailment, downsizing |
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| (noun) entrenchment consisting of an additional interior fortification to prolong the defense | - |
| retrial | (noun) a new trial in which issues already litigated and to which the court has already rendered a verdict or decision are reexamined by the same court; occurs when the initial trial is found to have been improper or unfair due to procedural errors | - |
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| retribution | (noun) the act of correcting for your wrongdoing | - |
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| (noun) the act of taking revenge (harming someone in retaliation for something harmful that they have done) especially in the next life | Synonyms: payback, vengeance |
| (noun) a justly deserved penalty | Synonyms: requital |
| retrieval | (noun) the act of regaining or saving something lost (or in danger of becoming lost) | Synonyms: recovery |
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| (noun) the cognitive operation of accessing information in memory | - |
| (noun) (computer science) the operation of accessing information from the computer's memory | - |
| retriever | (noun) a dog with heavy water-resistant coat that can be trained to retrieve game | - |
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| retro | (noun) a fashion reminiscent of the past | - |
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| retrofit | (noun) the act of adding a component or accessory to something that did not have it when it was manufactured | - |
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| (noun) a component or accessory added to something after it has been manufactured | - |
| retroflection | (noun) the act of bending backward | Synonyms: retroflexion |
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| (noun) an articulatory gesture made by turning the tip of the tongue back against the roof of the mouth | Synonyms: retroflexion |
| (noun) a turning or tilting backward of an organ or body part | Synonyms: retroflexion, retroversion |
| retroflexion | (noun) the act of bending backward | Synonyms: retroflection |
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| (noun) an articulatory gesture made by turning the tip of the tongue back against the roof of the mouth | Synonyms: retroflection |
| (noun) a turning or tilting backward of an organ or body part | Synonyms: retroflection, retroversion |
| retrogaming | (noun) The hobby of playing or collecting older video games and computer games. | - |
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| retrogression | (noun) returning to a former state | Synonyms: regress, regression, retroversion, reversion |
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| (noun) passing from a more complex to a simpler biological form | Synonyms: degeneration |
| retronym | (noun) a word introduced because an existing term has become inadequate | - |
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| retrorocket | (noun) a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course | - |
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| retrospect | (noun) contemplation of things past | - |
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| retrospection | (noun) memory for experiences that are past | - |
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| (noun) reference to things past | - |
| retrospective | (noun) an exhibition of a representative selection of an artist's life work | - |
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| retroversion | (noun) returning to a former state | Synonyms: regress, regression, retrogression, reversion |
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| (noun) translation back into the original language | - |
| (noun) a turning or tilting backward of an organ or body part | Synonyms: retroflection, retroflexion |
| retrovirus | (noun) any of a group of viruses that contain two single-strand linear RNA molecules per virion and reverse transcriptase (RNA to DNA); the virus transcribes its RNA into a cDNA provirus that is then incorporated into the host cell | - |
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| retrovision | (noun) a vision of events in the distant past | - |
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