| radiosensitivity | (noun) sensitivity to the action of radiant energy | Synonyms: photosensitivity |
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| ravigote | (noun) veloute sauce seasoned with chopped chervil, chives, tarragon, shallots and capers | Synonyms: ravigotte |
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| ravigotte | (noun) veloute sauce seasoned with chopped chervil, chives, tarragon, shallots and capers | Synonyms: ravigote |
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| ravine | (noun) a deep narrow steep-sided valley (especially one formed by running water) | - |
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| raving | (noun) declaiming wildly | - |
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| ravioli | (noun) small circular or square cases of dough with savory fillings | Synonyms: cappelletti |
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| ravisher | (noun) someone who assaults others sexually | Synonyms: debaucher, violator |
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| (noun) a very attractive or seductive looking woman | Synonyms: beauty, dish, knockout, looker, lulu, mantrap, peach, smasher, stunner, sweetheart |
| ravishment | (noun) the crime of forcing a person to submit to sexual intercourse against his or her will | Synonyms: assault, rape, violation |
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| (noun) a feeling of delight at being filled with wonder and enchantment | Synonyms: entrancement |
| reactivity | (noun) responsive to stimulation | Synonyms: responsiveness |
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| (noun) ready susceptibility to chemical change | - |
| receptivity | (noun) willingness or readiness to receive (especially impressions or ideas) | Synonyms: openness, receptiveness |
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| recidivism | (noun) habitual relapse into crime | - |
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| recidivist | (noun) someone who lapses into previous undesirable patterns of behavior | Synonyms: backslider, reversionist |
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| (noun) someone who is repeatedly arrested for criminal behavior (especially for the same criminal behavior) | Synonyms: habitual criminal, repeater |
| reductivism | (noun) an art movement in sculpture and painting that began in the 1950s and emphasized extreme simplification of form and color | Synonyms: minimal art, minimalism |
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| reduviid | (noun) a true bug: long-legged predacious bug living mostly on other insects; a few suck blood of mammals | Synonyms: assassin bug |
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| reflectivity | (noun) the ability to reflect beams or rays | Synonyms: reflection, reflexion |
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| (noun) the capability of quiet thought or contemplation | Synonyms: reflectiveness |
| (noun) the fraction of radiant energy that is reflected from a surface | Synonyms: coefficient of reflection, reflectance, reflection factor |
| reflexivity | (noun) the coreferential relation between a reflexive pronoun and its antecedent | Synonyms: reflexiveness |
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| (noun) (logic and mathematics) a relation such that it holds between an element and itself | Synonyms: reflexiveness |
| refractivity | (noun) the physical property of a medium as determined by its index of refraction | Synonyms: refractiveness |
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| relativisation | (noun) the act or result of making relative or regarding as relative rather than absolute. | Synonyms: relativization |
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| relativism | (noun) (philosophy) the philosophical doctrine that all criteria of judgment are relative to the individuals and situations involved | - |
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| relativity | (noun) the quality of being relative and having significance only in relation to something else | - |
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| (noun) (physics) the theory that space and time are relative concepts rather than absolute concepts | Synonyms: Einstein's theory of relativity, relativity theory, theory of relativity |
| relativization | (noun) the act or result of making relative or regarding as relative rather than absolute. | Synonyms: relativisation |
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| reliving | (noun) a recurrence of a prior experience | Synonyms: re-experiencing |
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| reluctivity | (noun) (physics) the resistance of a material to the establishment of a magnetic field in it | - |
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| reovirus | (noun) any of a group of non-arboviruses including the rotavirus causing infant enteritis | - |
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| reservist | (noun) a member of a military reserve | - |
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| resistivity | (noun) a material's opposition to the flow of electric current; measured in ohms | Synonyms: electric resistance, electrical resistance, impedance, ohmic resistance, resistance |
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| resolving | (noun) analysis into clear-cut components | Synonyms: resolution |
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| 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 |
| 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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| review | (noun) a subsequent examination of a patient for the purpose of monitoring earlier treatment | Synonyms: follow-up, followup, reexamination |
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| (noun) practice intended to polish performance or refresh the memory | Synonyms: brushup |
| (noun) a formal or official examination | Synonyms: inspection |
| (noun) (law) a judicial reexamination of the proceedings of a court (especially by an appellate court) | - |
| (noun) a new appraisal or evaluation | Synonyms: reappraisal, reassessment, revaluation |
| (noun) a summary at the end that repeats the substance of a longer discussion | Synonyms: recap, recapitulation |
| (noun) an essay or article that gives a critical evaluation (as of a book or play) | Synonyms: critical review, critique, review article |
| (noun) a variety show with topical sketches and songs and dancing and comedians | Synonyms: revue |
| (noun) a periodical that publishes critical essays on current affairs or literature or art | - |
| (noun) (accounting) a service (less exhaustive than an audit) that provides some assurance to interested parties as to the reliability of financial data | Synonyms: limited review |
| reviewer | (noun) a writer who reports and analyzes events of the day | Synonyms: commentator |
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| (noun) someone who reads manuscripts and judges their suitability for publication | Synonyms: reader, referee |
| revilement | (noun) a rude expression intended to offend or hurt | Synonyms: abuse, contumely, insult, vilification |
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| revisal | (noun) the act of rewriting something | Synonyms: rescript, revise, revision |
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| revise | (noun) the act of rewriting something | Synonyms: rescript, revisal, revision |
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| reviser | (noun) someone who puts text into appropriate form for publication | Synonyms: redact, redactor, rewrite man, rewriter |
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| revising | (noun) editing that involves writing something again | Synonyms: rewriting |
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| revision | (noun) the act of revising or altering (involving reconsideration and modification) | Synonyms: alteration |
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| (noun) something that has been written again | Synonyms: rescript, rewrite |
| (noun) the act of rewriting something | Synonyms: rescript, revisal, revise |
| revisionism | (noun) a moderate evolutionary form of Marxism | - |
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| (noun) any dangerous departure from the teachings of Marx | - |
| revisionist | (noun) a Communist who tries to rewrite Marxism to justify a retreat from the revolutionary position | - |
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| revitalisation | (noun) bringing again into activity and prominence | Synonyms: resurgence, revitalization, revival, revivification |
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| revitalization | (noun) bringing again into activity and prominence | Synonyms: resurgence, revitalisation, revival, revivification |
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| revival | (noun) bringing again into activity and prominence | Synonyms: resurgence, revitalisation, revitalization, revivification |
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| (noun) an evangelistic meeting intended to reawaken interest in religion | Synonyms: revival meeting |
| revivalism | (noun) an attempt to reawaken the evangelical faith | - |
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| revivalist | (noun) a preacher of the Christian gospel | Synonyms: evangelist, gospeler, gospeller |
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| revivification | (noun) bringing again into activity and prominence | Synonyms: resurgence, revitalisation, revitalization, revival |
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| rhabdovirus | (noun) any of a group of arboviruses including those causing rabies | - |
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| rhinovirus | (noun) any of a group of picornaviruses that are responsible for many upper respiratory infections | - |
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| ribavirin | (noun) an inhaled antiviral agent (trade name Virazole) that may be used to treat serious virus infections | Synonyms: Virazole |
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| riboflavin | (noun) a B vitamin that prevents skin lesions and weight loss | Synonyms: hepatoflavin, lactoflavin, ovoflavin, vitamin B2, vitamin G |
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| ritonavir | (noun) a protease inhibitor (trade name Norvir) used in treating HIV | Synonyms: Norvir |
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| rotavirus | (noun) the reovirus causing infant enteritis | - |
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| roving | (noun) travelling about without any clear destination | Synonyms: vagabondage, wandering |
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| salvia | (noun) any of various plants of the genus Salvia; a cosmopolitan herb | Synonyms: sage |
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| salvinorin | (noun) a hallucinogen obtained from Salvia divinorum | - |
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| sansevieria | (noun) grown as a houseplant for its mottled fleshy sword-shaped leaves or as a source of fiber | Synonyms: bowstring hemp |
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| saquinavir | (noun) a weak protease inhibitor (trade name Invirase) used in treating HIV | Synonyms: Invirase |
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| savin | (noun) procumbent or spreading juniper | Synonyms: dwarf juniper, Juniperus sabina |
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| saving | (noun) an act of economizing; reduction in cost | Synonyms: economy |
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| (noun) the activity of protecting something from loss or danger | Synonyms: preservation |
| (noun) recovery or preservation from loss or danger | Synonyms: deliverance, delivery, rescue |
| savings | (noun) a fund of money put by as a reserve | Synonyms: nest egg |
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| savior | (noun) a person who rescues you from harm or danger | Synonyms: deliverer, rescuer, saviour |
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| saviour | (noun) a person who rescues you from harm or danger | Synonyms: deliverer, rescuer, savior |
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| secundigravida | (noun) a woman who is pregnant for the second time | Synonyms: gravida II |
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| selectivity | (noun) the property of being selective | - |
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| sensitivity | (noun) the ability to respond to physical stimuli or to register small physical amounts or differences | Synonyms: sensitiveness |
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| (noun) the ability to respond to affective changes in your interpersonal environment | Synonyms: sensitiveness |
| (noun) (physiology) responsiveness to external stimuli; the faculty of sensation | Synonyms: sensibility, sensitiveness |
| (noun) sensitivity to emotional feelings (of self and others) | Synonyms: sensitiveness |
| (noun) susceptibility to a pathogen | Synonyms: predisposition |
| service | (noun) an act of help or assistance; something (such as a tool, software or system) used to render said help or assistance | - |
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| (noun) the act of public worship following prescribed rules | Synonyms: divine service, religious service |
| (noun) (sports) a stroke that puts the ball in play | Synonyms: serve |
| (noun) the act of mating by male animals | Synonyms: servicing |
| (noun) the act of delivering a writ or summons upon someone | Synonyms: service of process, serving |
| (noun) periodic maintenance on a car or machine | Synonyms: inspection and repair, overhaul |
| (noun) the performance of duties by a waiter or servant | - |
| (noun) employment in or work for another | - |
| (noun) work done by one person or group that benefits another | - |
| (noun) (law) the acts performed by an English feudal tenant for the benefit of his lord which formed the consideration for the property granted to him | - |
| (noun) tableware consisting of a complete set of articles (silver or dishware) for use at table | Synonyms: table service |
| (noun) a means of serving | Synonyms: avail, help |
| (noun) a force that is a branch of the armed forces | Synonyms: armed service, military service |
| (noun) a company or agency that performs a public service; subject to government regulation | - |
| serviceability | (noun) the quality of being able to provide good service | Synonyms: serviceableness, usability, usableness, useableness |
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| serviceableness | (noun) the quality of being able to provide good service | Synonyms: serviceability, usability, usableness, useableness |
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| serviceberry | (noun) edible purple or red berries | Synonyms: juneberry, saskatoon, shadberry |
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| (noun) any of various North American trees or shrubs having showy white flowers and edible blue-black or purplish fruit | Synonyms: Juneberry, service tree, shadblow, shadbush |
| serviceman | (noun) someone who serves in the armed forces; a member of a military force | Synonyms: man, military man, military personnel |
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| services | (noun) performance of duties or provision of space and equipment helpful to others | - |
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| servicing | (noun) the act of mating by male animals | Synonyms: service |
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| serviette | (noun) a small piece of table linen that is used to wipe the mouth and to cover the lap in order to protect clothing | Synonyms: napkin, table napkin |
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| servility | (noun) abject or cringing submissiveness | Synonyms: obsequiousness, subservience |
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| serving | (noun) the act of delivering a writ or summons upon someone | Synonyms: service, service of process |
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| (noun) an individual quantity of food or drink taken as part of a meal | Synonyms: helping, portion |
| servitor | (noun) someone who performs the duties of an attendant for someone else | - |
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| servitude | (noun) state of subjection to an owner or master or forced labor imposed as punishment | - |
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| shaving | (noun) the act of removing hair with a razor | Synonyms: shave |
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| (noun) the act of brushing against while passing | Synonyms: grazing, skimming |
| (noun) a thin fragment or slice (especially of wood) that has been shaved from something | Synonyms: paring, sliver |
| silvervine | (noun) ornamental vine of eastern Asia having yellow edible fruit and leaves with silver-white markings | Synonyms: Actinidia polygama, silver vine |
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| silviculture | (noun) the branch of forestry dealing with the development and care of forests | - |
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| skivvies | (noun) (used in the plural) men's underwear consisting of cotton undershirt and underpants | - |
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| skydiving | (noun) performing acrobatics in free fall before pulling the ripcord of a parachute | - |
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| slivovitz | (noun) a colorless plum brandy popular in the Balkans | - |
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| solving | (noun) finding a solution to a problem | Synonyms: resolution |
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| soviet | (noun) an elected governmental council in a communist country (especially one that is a member of the Union of Soviet Socialist Republics) | - |
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| sovietism | (noun) Soviet communism | Synonyms: Bolshevism, collectivism |
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| spavin | (noun) a swelling of the hock joint of a horse; resulting in lameness | - |
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| splitsville | (noun) separation or breakup or divorce | - |
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| starving | (noun) the act of depriving of food or subjecting to famine | Synonyms: starvation |
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| stevia | (noun) any plant of the genus Stevia or the closely related genus Piqueria having glutinous foliage and white or purplish flowers; Central and South America | - |
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| (noun) any plant of the genus Piqueria or the closely related genus Stevia | - |
| striving | (noun) an effortful attempt to attain a goal | Synonyms: nisus, pains, strain |
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| suavity | (noun) the quality of being bland and gracious or ingratiating in manner | Synonyms: blandness, smoothness, suaveness |
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| subdivider | (noun) someone who divides parts into smaller parts (especially a divider of land into building sites) | - |
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| subdivision | (noun) the act of subdividing; division of something previously divided | - |
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| (noun) a section of a section; a part of a part; i.e., a part of something already divided | Synonyms: subsection |
| (noun) a self-contained part of a larger composition (written or musical) | Synonyms: section |
| (noun) a division of some larger or more complex organization | Synonyms: arm, branch |
| (noun) an area composed of subdivided lots | - |
| subjectivism | (noun) the quality of being subjective | - |
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| (noun) (philosophy) the doctrine that knowledge and value are dependent on and limited by your subjective experience | - |
| subjectivist | (noun) a person who subscribes to subjectivism | - |
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| subjectivity | (noun) judgment based on individual personal impressions and feelings and opinions rather than external facts | Synonyms: subjectiveness |
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| subservience | (noun) abject or cringing submissiveness | Synonyms: obsequiousness, servility |
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| (noun) the condition of being something that is useful in reaching an end or carrying out a plan | - |
| (noun) in a subservient state | Synonyms: subservientness |
| subservientness | (noun) in a subservient state | Synonyms: subservience |
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| superconductivity | (noun) the disappearance of electrical resistance at very low temperatures | - |
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