| propionaldehyde | (noun) a colorless liquid aldehyde | Synonyms: propanal |
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| proportional | (noun) one of the quantities in a mathematical proportion | - |
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| proportionality | (noun) harmonious arrangement or relation of parts or elements within a whole (as in a design) | Synonyms: balance, proportion |
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| (noun) a ratio of two quantities that is constant | - |
| proportionateness | (noun) the relation of corresponding in degree or size or amount | Synonyms: commensurateness, correspondence |
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| proprionamide | (noun) the amide of propionic acid (C2H5CONH2) | Synonyms: propanamide |
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| pseudomonad | (noun) bacteria usually producing greenish fluorescent water-soluble pigment; some pathogenic for plants and animals | - |
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| ramona | (noun) shrubby plant with aromatic greyish-green leaves used as a cooking herb | Synonyms: common sage, Salvia officinalis |
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| rational | (noun) an integer or a fraction | Synonyms: rational number |
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| rationale | (noun) (law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature) | Synonyms: principle |
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| rationalisation | (noun) systematic organization; the act of organizing something according to a system or a rationale | Synonyms: rationalization, systematisation, systematization |
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| (noun) (mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equation | Synonyms: rationalization |
| (noun) the organization of a business according to scientific principles of management in order to increase efficiency | Synonyms: rationalization |
| (noun) the cognitive process of making something seem consistent with or based on reason | Synonyms: rationalization |
| (noun) (psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening | Synonyms: rationalization |
| rationalism | (noun) the doctrine that reason is the right basis for regulating conduct | Synonyms: freethinking |
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| (noun) (philosophy) the doctrine that knowledge is acquired by reason without resort to experience | - |
| (noun) the theological doctrine that human reason rather than divine revelation establishes religious truth | - |
| rationalist | (noun) someone who emphasizes observable facts and excludes metaphysical speculation about origins or ultimate causes | Synonyms: positivist |
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| rationality | (noun) the quality of being consistent with or based on logic | Synonyms: rationalness |
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| (noun) the state of having good sense and sound judgment | Synonyms: reason, reasonableness |
| rationalization | (noun) systematic organization; the act of organizing something according to a system or a rationale | Synonyms: rationalisation, systematisation, systematization |
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| (noun) (mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equation | Synonyms: rationalisation |
| (noun) the organization of a business according to scientific principles of management in order to increase efficiency | Synonyms: rationalisation |
| (noun) the cognitive process of making something seem consistent with or based on reason | Synonyms: rationalisation |
| (noun) (psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening | Synonyms: rationalisation |
| rationalness | (noun) the quality of being consistent with or based on logic | Synonyms: rationality |
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| reactionary | (noun) an extreme conservative; an opponent of progress or liberalism | Synonyms: extreme right-winger, ultraconservative |
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| 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 |
| recessional | (noun) a hymn that is sung at the end of a service as the clergy and choir withdraw | - |
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| (noun) the withdrawal of the clergy and choir from the chancel to the vestry at the end of a church service | Synonyms: recession |
| regionalism | (noun) loyalty to the interests of a particular region | - |
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| (noun) a feature (as a pronunciation or expression or custom) that is characteristic of a particular region | - |
| (noun) a foreign policy that defines the international interests of a country in terms of particular geographic areas | - |
| regionality | (noun) The property of being of, or pertaining to, a specific region or district. | - |
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| (noun) The property of being of, or pertaining to, a large geographic region. | - |
| resonance | (noun) having the character of a loud deep sound; the quality of being resonant | Synonyms: plangency, reverberance, ringing, sonority, sonorousness, vibrancy |
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| (noun) the quality imparted to voiced speech sounds by the action of the resonating chambers of the throat and mouth and nasal cavities | - |
| (noun) a vibration of large amplitude produced by a relatively small vibration near the same frequency of vibration as the natural frequency of the resonating system | - |
| (noun) an excited state of a stable particle causing a sharp maximum in the probability of absorption of electromagnetic radiation | - |
| (noun) a relationship of mutual understanding or trust and agreement between people | Synonyms: rapport |
| resonator | (noun) any system that resonates | - |
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| (noun) an electrical circuit that combines capacitance and inductance in such a way that a periodic electric oscillation will reach maximum amplitude | Synonyms: resonant circuit |
| (noun) a hollow chamber whose dimensions allow the resonant oscillation of electromagnetic or acoustic waves | Synonyms: cavity resonator, resonating chamber |
| revolutionariness | (noun) The state or quality of being revolutionary. | - |
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| revolutionary | (noun) a radical supporter of political or social revolution | Synonyms: revolutionist, subversive, subverter |
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| ritonavir | (noun) a protease inhibitor (trade name Norvir) used in treating HIV | Synonyms: Norvir |
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| sayonara | (noun) a farewell remark | Synonyms: adieu, adios, arrivederci, au revoir, auf wiedersehen, bye-bye, bye, cheerio, good-by, good-bye, good day, goodby, goodbye, so long |
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| seasonableness | (noun) being at the right time | Synonyms: timeliness |
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| seasonal | (noun) a worker who finds employment only in certain seasons | Synonyms: seasonal worker |
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| sectional | (noun) a piece of furniture made up of sections that can be arranged individually or together | - |
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| sectionalisation | (noun) the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart | Synonyms: division, partition, partitioning, sectionalization, segmentation |
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| sectionalism | (noun) a partiality for some particular place | Synonyms: localism, provincialism |
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| sectionalization | (noun) the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart | Synonyms: division, partition, partitioning, sectionalisation, segmentation |
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| semiprofessional | (noun) an athlete who plays for pay on a part-time basis | Synonyms: semipro |
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| sensationalism | (noun) (philosophy) the doctrine that knowledge derives from experience | Synonyms: empiricism, empiricist philosophy |
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| (noun) (philosophy) the ethical doctrine that feeling is the only criterion for what is good | Synonyms: sensualism |
| (noun) the journalistic use of subject matter that appeals to vulgar tastes | Synonyms: luridness |
| (noun) subject matter that is calculated to excite and please vulgar tastes | - |
| sensationalist | (noun) someone who uses exaggerated or lurid material in order to gain public attention | Synonyms: ballyhoo artist |
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| sonant | (noun) a speech sound accompanied by sound from the vocal cords | Synonyms: voiced sound |
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| sonar | (noun) a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return | Synonyms: asdic, echo sounder |
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| sonata | (noun) a musical composition of 3 or 4 movements of contrasting forms | - |
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| sonatina | (noun) a short and simple sonata | - |
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| stationariness | (noun) remaining in place | Synonyms: fixedness, immobility |
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| sulfonamide | (noun) antibacterial consisting of any of several synthetic organic compounds capable of inhibiting the growth of bacteria that require PABA | Synonyms: sulfa, sulfa drug, sulpha |
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| sulfonate | (noun) a salt of sulphonic acid | - |
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| tamponade | (noun) blockage or closure (as of a wound or body cavity) by (or as if by) a tampon (especially to stop bleeding) | Synonyms: tamponage |
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| tamponage | (noun) blockage or closure (as of a wound or body cavity) by (or as if by) a tampon (especially to stop bleeding) | Synonyms: tamponade |
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| tonality | (noun) any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music | Synonyms: key |
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| traditionalism | (noun) adherence to tradition (especially in cultural or religious matters) | - |
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| (noun) strict adherence to traditional methods or teachings | Synonyms: traditionality |
| (noun) the doctrine that all knowledge was originally derived by divine revelation and that it is transmitted by traditions | - |
| traditionalist | (noun) one who adheres to traditional views | Synonyms: diehard |
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| traditionality | (noun) strict adherence to traditional methods or teachings | Synonyms: traditionalism |
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| trichomonad | (noun) cause of trichomoniasis in women and cattle and birds | - |
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| ultranationalism | (noun) fanatical patriotism | Synonyms: chauvinism, jingoism, superpatriotism |
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| unconditionality | (noun) The quality or state of being absolute; of being without conditions, limitations, reservations or qualifications. | - |
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| unconstitutionality | (noun) The status of being unconstitutional; of not being in accord with the provisions of the appropriate constitution. | - |
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| unconventionality | (noun) unorthodoxy by virtue of being unconventional | - |
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| (noun) originality by virtue of being unconventional | - |
| unemotionality | (noun) absence of emotion | Synonyms: emotionlessness |
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| (noun) apathy demonstrated by an absence of emotional reactions | Synonyms: emotionlessness, impassiveness, impassivity, indifference, phlegm, stolidity |
| unmentionable | (noun) a garment worn under other garments | Synonyms: undergarment |
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| unquestionability | (noun) the quality of being beyond question or dispute or doubt | Synonyms: indisputability, indubitability, unquestionableness |
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| unquestionableness | (noun) the quality of being beyond question or dispute or doubt | Synonyms: indisputability, indubitability, unquestionability |
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| unseasonableness | (noun) being at an inappropriate time | Synonyms: untimeliness |
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| veronal | (noun) a barbiturate used as a hypnotic | Synonyms: barbital, barbitone, diethylbarbituric acid, diethylmalonylurea |
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| visionariness | (noun) The state or condition of being imaginary or illusory. | - |
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| visionary | (noun) a person with unusual powers of foresight | Synonyms: illusionist, seer |
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| (noun) a person given to fanciful speculations and enthusiasms with little regard for what is actually possible | - |
| xanthomonad | (noun) bacteria producing yellow non-water-soluble pigments; some pathogenic for plants | - |
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| zona | (noun) (anatomy) any encircling or beltlike structure | Synonyms: zone |
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