| retail | (noun) the selling of goods to consumers; usually in small quantities and not for resale | - |
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| retailer | (noun) a merchant who sells goods at retail | Synonyms: retail merchant |
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| retailing | (noun) the activities involved in selling commodities directly to consumers | - |
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| retainer | (noun) a dental appliance that holds teeth (or a prosthesis) in position after orthodontic treatment | - |
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| (noun) a person working in the service of another (especially in the household) | Synonyms: servant |
| (noun) a fee charged in advance to retain the services of someone | Synonyms: consideration |
| retake | (noun) a shot or scene that is photographed again | - |
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| retaking | (noun) the act of taking something back | Synonyms: recapture |
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| retaliation | (noun) action taken in return for an injury or offense | Synonyms: revenge |
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| retaliator | (noun) someone who takes vengeance | Synonyms: avenger |
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| retard | (noun) a person of subnormal intelligence | Synonyms: changeling, cretin, half-wit, idiot, imbecile, moron |
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| retardant | (noun) any agent that retards or delays or hinders | Synonyms: retardation, retardent |
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| retardation | (noun) the act of slowing down or falling behind | Synonyms: lag, slowdown |
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| (noun) a decrease in rate of change | Synonyms: deceleration, slowing |
| (noun) lack of normal development of intellectual capacities | Synonyms: backwardness, mental retardation, slowness, subnormality |
| (noun) any agent that retards or delays or hinders | Synonyms: retardant, retardent |
| (noun) the extent to which something is delayed or held back | - |
| retarded | (noun) people collectively who are mentally retarded | Synonyms: developmentally challenged, mentally retarded |
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| retardent | (noun) any agent that retards or delays or hinders | Synonyms: retardant, retardation |
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| retch | (noun) an involuntary spasm of ineffectual vomiting | Synonyms: heave |
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| rete | (noun) a network of intersecting blood vessels or intersecting nerves or intersecting lymph vessels | Synonyms: plexus |
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| retem | (noun) desert shrub of Syria and Arabia having small white flowers; constitutes the juniper of the Old Testament; sometimes placed in genus Genista | Synonyms: Genista raetam, juniper, juniper bush, raetam, Retama raetam |
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| retention | (noun) the act of retaining something | Synonyms: holding, keeping |
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| (noun) the power of retaining liquid | Synonyms: retentiveness, retentivity |
| (noun) the power of retaining and recalling past experience | Synonyms: memory, retentiveness, retentivity |
| retentiveness | (noun) the property of retaining possessions that have been acquired | Synonyms: retentivity |
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| (noun) the power of retaining liquid | Synonyms: retention, retentivity |
| (noun) the power of retaining and recalling past experience | Synonyms: memory, retention, retentivity |
| retentivity | (noun) the power of retaining liquid | Synonyms: retention, retentiveness |
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| (noun) the property of retaining possessions that have been acquired | Synonyms: retentiveness |
| (noun) the power of retaining and recalling past experience | Synonyms: memory, retention, retentiveness |
| rethink | (noun) thinking again about a choice previously made | Synonyms: afterthought, reconsideration, second thought |
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| reticence | (noun) the trait of being uncommunicative; not volunteering anything more than necessary | Synonyms: reserve, taciturnity |
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| reticle | (noun) a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument | Synonyms: graticule, reticule |
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| reticulation | (noun) an arrangement resembling a net or network | - |
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| (noun) (photography) the formation of a network of cracks or wrinkles in a photographic emulsion | - |
| reticule | (noun) a woman's drawstring handbag; usually made of net or beading or brocade; used in 18th and 19th centuries | - |
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| (noun) a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument | Synonyms: graticule, reticle |
| reticulocyte | (noun) an immature red blood cell containing a network of filaments or granules | - |
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| reticulum | (noun) the second compartment of the stomach of a ruminant | Synonyms: second stomach |
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| (noun) any fine network (especially one in the body composed of cells or blood vessels) | - |
| retina | (noun) the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve | - |
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| retinal | (noun) either of two yellow to red retinal pigments formed from rhodopsin by the action of light | Synonyms: retinene |
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| retinene | (noun) either of two yellow to red retinal pigments formed from rhodopsin by the action of light | Synonyms: retinal |
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| retinitis | (noun) inflammation of the retina | - |
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| retinoblastoma | (noun) malignant ocular tumor of retinal cells; usually occurs before the third year of life; composed of primitive small round retinal cells | - |
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| retinol | (noun) an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene | Synonyms: vitamin A1 |
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| retinopathy | (noun) a disease of the retina that can result in loss of vision | - |
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| retinue | (noun) the group following and attending to some important person | Synonyms: cortege, entourage, suite |
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| retiree | (noun) someone who has retired from active working | Synonyms: retired person |
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| retirement | (noun) withdrawal from your position or occupation | - |
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| (noun) withdrawal for prayer and study and meditation | Synonyms: retreat |
| (noun) the state of being retired from one's business or occupation | - |
| retort | (noun) a vessel where substances are distilled or decomposed by heat | - |
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| (noun) a quick reply to a question or remark (especially a witty or critical one) | Synonyms: comeback, counter, rejoinder, replication, return, riposte |
| 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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| retsina | (noun) Greek wine flavored with resin | - |
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| rettery | (noun) a place or establishment where flax is retted. | - |
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| return | (noun) the act of going back to a prior location | - |
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| (noun) a coming to or returning home | Synonyms: homecoming |
| (noun) getting something back again | Synonyms: regaining, restitution, restoration |
| (noun) a tennis stroke that sends the ball back to the other player | - |
| (noun) (American football) the act of running back the ball after a kickoff or punt or interception or fumble | - |
| (noun) a reciprocal group action | Synonyms: getting even, paying back |
| (noun) the act of someone appearing again | Synonyms: reappearance |
| (noun) the key on electric typewriters or computer keyboards that causes a carriage return and a line feed | Synonyms: return key |
| (noun) document giving the tax collector information about the taxpayer's tax liability | Synonyms: income tax return, tax return |
| (noun) a quick reply to a question or remark (especially a witty or critical one) | Synonyms: comeback, counter, rejoinder, replication, retort, riposte |
| (noun) happening again (especially at regular intervals) | Synonyms: recurrence |
| (noun) the occurrence of a change in direction back in the opposite direction | Synonyms: coming back |
| (noun) the income or profit arising from such transactions as the sale of land or other property | Synonyms: issue, payoff, proceeds, take, takings, yield |