| reabsorption | (noun) the organic process in which the substance of some differentiated structure that has been produced by the body undergoes lysis and assimilation | Synonyms: resorption |
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| reach | (noun) the act of physically reaching or thrusting out | Synonyms: reaching, stretch |
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| (noun) an area in which something acts or operates or has power or control: | Synonyms: ambit, compass, orbit, range, scope |
| (noun) the limit of capability | Synonyms: compass, grasp, range |
| (noun) the limits within which something can be effective | Synonyms: range |
| reaching | (noun) accomplishment of an objective | Synonyms: arrival |
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| (noun) the act of physically reaching or thrusting out | Synonyms: reach, stretch |
| reactance | (noun) opposition to the flow of electric current resulting from inductance and capacitance (rather than resistance) | - |
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| reactant | (noun) a chemical substance that is present at the start of a chemical reaction | - |
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| reaction | (noun) a bodily process occurring due to the effect of some antecedent stimulus or agent | Synonyms: response |
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| (noun) doing something in opposition to another way of doing it that you don't like | - |
| (noun) an idea evoked by some experience | - |
| (noun) extreme conservatism in political or social matters | - |
| (noun) (mechanics) the equal and opposite force that is produced when any force is applied to a body | - |
| (noun) a response that reveals a person's feelings or attitude | - |
| (noun) (chemistry) a process in which one or more substances are changed into others | Synonyms: chemical reaction |
| reactionary | (noun) an extreme conservative; an opponent of progress or liberalism | Synonyms: extreme right-winger, ultraconservative |
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| reactionism | (noun) the political orientation of reactionaries | - |
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| reactivity | (noun) responsive to stimulation | Synonyms: responsiveness |
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| (noun) ready susceptibility to chemical change | - |
| reactor | (noun) (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements | Synonyms: nuclear reactor |
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| (noun) an electrical device used to introduce reactance into a circuit | - |
| read | (noun) something that is read | - |
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| readability | (noun) the quality of written language that makes it easy to read and understand | - |
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| (noun) a quality of writing (print or handwriting) that can be easily read | Synonyms: legibility |
| reader | (noun) one of a series of texts for students learning to read | - |
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| (noun) a person who enjoys reading | - |
| (noun) a public lecturer at certain universities | Synonyms: lector, lecturer |
| (noun) someone who contracts to receive and pay for a service or a certain number of issues of a publication | Synonyms: subscriber |
| (noun) a person who can read; a literate person | - |
| (noun) someone who reads proof in order to find errors and mark corrections | Synonyms: proofreader |
| (noun) someone who reads manuscripts and judges their suitability for publication | Synonyms: referee, reviewer |
| (noun) someone who reads the lessons in a church service; someone ordained in a minor order of the Roman Catholic Church | Synonyms: lector |
| readership | (noun) the audience reached by written communications (books or magazines or newspapers etc.) | - |
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| readiness | (noun) prompt willingness | Synonyms: eagerness, forwardness, zeal |
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| (noun) a natural effortlessness | Synonyms: facility |
| (noun) (psychology) being temporarily ready to respond in a particular way | Synonyms: set |
| (noun) the state of having been made ready or prepared for use or action (especially military action) | Synonyms: preparation, preparedness |
| reading | (noun) the act of measuring with meters or similar instruments | Synonyms: meter reading |
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| (noun) the cognitive process of understanding a written linguistic message | - |
| (noun) a mental representation of the meaning or significance of something | Synonyms: interpretation, version |
| (noun) a datum about some physical state that is presented to a user by a meter or similar instrument | Synonyms: indication, meter reading |
| (noun) written material intended to be read | Synonyms: reading material |
| (noun) a particular interpretation or performance | - |
| (noun) a public instance of reciting or repeating (from memory) something prepared in advance | Synonyms: recital, recitation |
| readjustment | (noun) the act of adjusting again (to changed circumstances) | - |
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| (noun) the act of adjusting something to match a standard | Synonyms: adjustment, registration |
| readmission | (noun) the act of admitting someone again | - |
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| readout | (noun) an electronic device that displays information | Synonyms: read-out |
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| (noun) the information displayed or recorded on an electronic device | Synonyms: read-out |
| (noun) the output of a computer in readable form | Synonyms: read-out |
| ready | (noun) poised for action | - |
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| readying | (noun) the activity of putting or setting in order in advance of some act or purpose | Synonyms: preparation |
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| reaffiliation | (noun) affiliation anew | - |
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| reaffirmation | (noun) renewed affirmation | Synonyms: reassertion |
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| reagent | (noun) a chemical agent for use in chemical reactions | - |
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| reagin | (noun) an immunoglobulin E that is formed as an antibody against allergens (such as pollen); attaches to cell membranes causing the release of histamine and other substances responsible for the local inflammation characteristic of an allergy | - |
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| real | (noun) any rational or irrational number | Synonyms: real number |
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| (noun) an old small silver Spanish coin | - |
| (noun) the basic unit of money in Brazil; equal to 100 centavos | - |
| realgar | (noun) a rare soft orange mineral consisting of arsenic sulphide; an important ore of arsenic | - |
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| realisation | (noun) making real or giving the appearance of reality | Synonyms: actualisation, actualization, realization |
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| (noun) a sale in order to obtain money (as a sale of stock or a sale of the estate of a bankrupt person) or the money so obtained | Synonyms: realization |
| (noun) something that is made real or concrete | Synonyms: fruition, realization |
| (noun) the completion or enrichment of a piece of music left sparsely notated by a composer | Synonyms: realization |
| (noun) coming to understand something clearly and distinctly | Synonyms: realization, recognition |
| (noun) a musical composition that has been completed or enriched by someone other than the composer | Synonyms: realization |
| realism | (noun) the attribute of accepting the facts of life and favoring practicality and literal truth | Synonyms: pragmatism |
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| (noun) (philosophy) the philosophical doctrine that physical objects continue to exist when not perceived | Synonyms: naive realism |
| (noun) (philosophy) the philosophical doctrine that abstract concepts exist independent of their names | Synonyms: Platonism |
| (noun) an artistic movement in 19th century France; artists and writers strove for detailed realistic and factual description | Synonyms: naturalism |
| (noun) the state of being actual or real | Synonyms: reality, realness |
| realist | (noun) a philosopher who believes that universals are real and exist independently of anyone thinking of them | - |
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| (noun) a painter who represents the world realistically and not in an idealized or romantic style | - |
| (noun) a person who accepts the world as it literally is and deals with it accordingly | - |
| reality | (noun) the quality possessed by something that is real | - |
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| (noun) all of your experiences that determine how things appear to you | Synonyms: world |
| (noun) the state of being actual or real | Synonyms: realism, realness |
| (noun) the state of the world as it really is rather than as you might want it to be | - |
| realization | (noun) making real or giving the appearance of reality | Synonyms: actualisation, actualization, realisation |
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| (noun) a sale in order to obtain money (as a sale of stock or a sale of the estate of a bankrupt person) or the money so obtained | Synonyms: realisation |
| (noun) something that is made real or concrete | Synonyms: fruition, realisation |
| (noun) the completion or enrichment of a piece of music left sparsely notated by a composer | Synonyms: realisation |
| (noun) coming to understand something clearly and distinctly | Synonyms: realisation, recognition |
| (noun) a musical composition that has been completed or enriched by someone other than the composer | Synonyms: realisation |
| reallocation | (noun) a new apportionment (especially a new apportionment of congressional seats in the United States on the basis of census results) | Synonyms: reallotment, reapportionment |
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| (noun) a share that has been allocated again | - |
| reallotment | (noun) a new apportionment (especially a new apportionment of congressional seats in the United States on the basis of census results) | Synonyms: reallocation, reapportionment |
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| realm | (noun) a knowledge domain that you are interested in or are communicating about | Synonyms: region |
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| (noun) the domain ruled by a king or queen | Synonyms: kingdom |
| (noun) a domain in which something is dominant | Synonyms: kingdom, land |
| realness | (noun) the state of being actual or real | Synonyms: realism, reality |
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| realpolitik | (noun) politics based on practical rather than moral or ideological considerations | Synonyms: practical politics |
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| realty | (noun) property consisting of houses and land | Synonyms: immovable, real estate, real property |
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| ream | (noun) a quantity of paper; 480 or 500 sheets; one ream equals 20 quires | - |
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| (noun) a large quantity of written matter | - |
| reamer | (noun) a drill that is used to shape or enlarge holes | - |
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| (noun) a squeezer with a conical ridged center that is used for squeezing juice from citrus fruit | Synonyms: juice reamer, juicer |
| reaper | (noun) farm machine that gathers a food crop from the fields | Synonyms: harvester |
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| (noun) someone who helps to gather the harvest | Synonyms: harvester |
| reappearance | (noun) the act of someone appearing again | Synonyms: return |
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| (noun) the event of something appearing again | - |
| reapportionment | (noun) a new apportionment (especially a new apportionment of congressional seats in the United States on the basis of census results) | Synonyms: reallocation, reallotment |
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| reappraisal | (noun) a new appraisal or evaluation | Synonyms: reassessment, revaluation, review |
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| rear | (noun) the side that goes last or is not normally seen | Synonyms: back |
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| (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear end, rump, seat, stern, tail, tail end, tooshie, tush |
| (noun) the back of a military formation or procession | - |
| (noun) the side of an object that is opposite its front | Synonyms: back end, backside |
| (noun) the part of something that is furthest from the normal viewer | Synonyms: back |
| rearguard | (noun) a detachment assigned to protect the rear of a (retreating) military body | - |
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| rearing | (noun) helping someone grow up to be an accepted member of the community | Synonyms: breeding, bringing up, fosterage, fostering, nurture, raising, upbringing |
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| (noun) the properties acquired as a consequence of the way you were treated as a child | Synonyms: nurture, raising |
| rearmament | (noun) the act of arming again | - |
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| rearrangement | (noun) changing an arrangement | - |
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| rearward | (noun) direction toward the rear | - |
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| reason | (noun) the capacity for rational thought or inference or discrimination | Synonyms: intellect, understanding |
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| (noun) a fact that logically justifies some premise or conclusion | - |
| (noun) a justification for something existing or happening | Synonyms: cause, grounds |
| (noun) an explanation of the cause of some phenomenon | - |
| (noun) a rational motive for a belief or action | Synonyms: ground, occasion |
| (noun) the state of having good sense and sound judgment | Synonyms: rationality, reasonableness |
| reasonableness | (noun) goodness of reason and judgment | - |
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| (noun) moderation in expectations | - |
| (noun) the property of being moderate in price or expenditures | Synonyms: moderateness, modestness |
| (noun) the quality of being plausible or acceptable to a reasonable person | Synonyms: tenability, tenableness |
| (noun) the state of having good sense and sound judgment | Synonyms: rationality, reason |
| reasoner | (noun) someone who reasons logically | Synonyms: ratiocinator |
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| reasoning | (noun) thinking that is coherent and logical | Synonyms: abstract thought, logical thinking |
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| reassembly | (noun) assembling again | Synonyms: refabrication |
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| reassertion | (noun) renewed affirmation | Synonyms: reaffirmation |
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| reassessment | (noun) a new appraisal or evaluation | Synonyms: reappraisal, revaluation, review |
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| reassignment | (noun) assignment to a different duty | - |
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| reassurance | (noun) the act of reassuring; restoring someone's confidence | - |
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| reata | (noun) a long noosed rope used to catch animals | Synonyms: lariat, lasso, riata |
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