| refract | (verb) determine the refracting power of (a lens) | - |
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| (verb) subject to refraction | - |
| refractile | (adjective) of or relating to or capable of refraction | Synonyms: refractive |
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| refraction | (noun) the amount by which a propagating wave is bent | Synonyms: deflection, deflexion |
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| (noun) the change in direction of a propagating wave (light or sound) when passing from one medium to another | - |
| refractive | (adjective) of or relating to or capable of refraction | Synonyms: refractile |
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| (adjective) capable of changing the direction (of a light or sound wave) | Synonyms: deflective |
| refractiveness | (noun) the physical property of a medium as determined by its index of refraction | Synonyms: refractivity |
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| refractivity | (noun) the physical property of a medium as determined by its index of refraction | Synonyms: refractiveness |
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| refractometer | (noun) measuring instrument for measuring the refractive index of a substance | - |
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| refractoriness | (noun) the trait of being unmanageable | Synonyms: recalcitrance, recalcitrancy, unmanageableness |
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| refractory | (adjective) stubbornly resistant to authority or control | Synonyms: fractious, recalcitrant |
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| (adjective) temporarily unresponsive or not fully responsive to a process or stimulus | - |
| (adjective) not responding to treatment | Synonyms: stubborn |
| (noun) lining consisting of material with a high melting point; used to line the inside walls of a furnace | Synonyms: furnace lining |
| refracture | (verb) break (a bone) that was previously broken but mended in an abnormal way | - |
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| refrain | (noun) the part of a song where a soloist is joined by a group of singers | Synonyms: chorus |
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| (verb) choose not to consume | Synonyms: abstain, desist |
| (verb) resist doing something | Synonyms: forbear |
| refresh | (verb) make fresh again | Synonyms: freshen, refreshen |
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| (verb) become or make oneself fresh again | Synonyms: freshen, freshen up, refreshen |
| (verb) make (to feel) fresh | Synonyms: freshen |
| (verb) refresh one's memory | Synonyms: brush up, review |
| refreshed | (adjective) with restored energy | Synonyms: fresh, invigorated, reinvigorated |
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| refreshen | (verb) become or make oneself fresh again | Synonyms: freshen, freshen up, refresh |
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| (verb) make fresh again | Synonyms: freshen, refresh |
| refresher | (noun) a course that reviews and updates a topic for those who have not kept abreast of developments | Synonyms: refresher course |
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| (noun) a drink that refreshes | - |
| (noun) a fee (in addition to that marked on the brief) paid to counsel in a case that lasts more than one day | - |
| refreshful | (adjective) imparting vitality and energy | Synonyms: bracing, brisk, fresh, refreshing, tonic |
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| refreshfully | (adverb) in a manner that relieves fatigue and restores vitality | Synonyms: refreshingly |
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| refreshing | (adjective) imparting vitality and energy | Synonyms: bracing, brisk, fresh, refreshful, tonic |
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| (adjective) pleasantly new or different | Synonyms: novel |
| refreshingly | (adverb) in a pleasantly novel manner | - |
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| (adverb) in a manner that relieves fatigue and restores vitality | Synonyms: refreshfully |
| refreshment | (noun) activity that refreshes and recreates; activity that renews your health and spirits by enjoyment and relaxation | Synonyms: recreation |
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| (noun) snacks and drinks served as a light meal | - |
| refrigerant | (adjective) causing cooling or freezing | Synonyms: refrigerating |
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| (noun) any substance used to provide cooling (as in a refrigerator) | - |
| refrigerate | (verb) cool or chill in or as if in a refrigerator | - |
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| (verb) preserve by chilling | - |
| refrigerated | (adjective) made or kept cold by refrigeration | - |
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| refrigerating | (adjective) causing cooling or freezing | Synonyms: refrigerant |
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| refrigeration | (noun) deliberately lowering the body's temperature for therapeutic purposes | - |
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| (noun) the process of cooling or freezing (e.g., food) for preservative purposes | Synonyms: infrigidation |
| refrigerator | (noun) white goods in which food can be stored at low temperatures | Synonyms: icebox |
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