| autofluorescence | (noun) self-induced fluorescence | - |
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| crescendo | (noun) (music) a gradual increase in loudness | - |
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| crescent | (noun) any shape resembling the curved shape of the moon in its first or last quarters | - |
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| decrescendo | (noun) (music) a gradual decrease in loudness | Synonyms: diminuendo |
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| efflorescence | (noun) a powdery deposit on a surface | Synonyms: bloom |
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| (noun) the time and process of budding and unfolding of blossoms | Synonyms: anthesis, blossoming, florescence, flowering, inflorescence |
| (noun) any red eruption of the skin | Synonyms: rash, roseola, skin rash |
| (noun) the period of greatest prosperity or productivity | Synonyms: bloom, blossom, flower, flush, heyday, peak, prime |
| excrescence | (noun) (pathology) an abnormal outgrowth or enlargement of some part of the body | - |
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| (noun) something that bulges out or is protuberant or projects from its surroundings | Synonyms: bulge, bump, extrusion, gibbosity, gibbousness, hump, jut, prominence, protrusion, protuberance, swelling |
| florescence | (noun) the time and process of budding and unfolding of blossoms | Synonyms: anthesis, blossoming, efflorescence, flowering, inflorescence |
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| fluorescein | (noun) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed) | Synonyms: fluoresceine, fluorescent dye, resorcinolphthalein |
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| fluoresceine | (noun) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed) | Synonyms: fluorescein, fluorescent dye, resorcinolphthalein |
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| fluorescence | (noun) light emitted during absorption of radiation of some other (invisible) wavelength | - |
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| fluorescent | (noun) a lighting fixture that uses a fluorescent lamp | Synonyms: fluorescent fixture |
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| fresco | (noun) a durable method of painting on a wall by using watercolors on wet plaster | - |
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| (noun) a mural done with watercolors on wet plaster | - |
| immunofluorescence | (noun) (immunology) a technique that uses antibodies linked to a fluorescent dye in order to study antigens in a sample of tissue | - |
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| inflorescence | (noun) the flowering part of a plant or arrangement of flowers on a stalk | - |
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| (noun) the time and process of budding and unfolding of blossoms | Synonyms: anthesis, blossoming, efflorescence, florescence, flowering |
| phosphorescence | (noun) a fluorescence that persists after the bombarding radiation has ceased | - |
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| preschool | (noun) an educational institution for children too young for elementary school | - |
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| preschooler | (noun) a child who attends a preschool or kindergarten | Synonyms: kindergartener, kindergartner |
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| prescience | (noun) the power to foresee the future | Synonyms: prevision |
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| prescript | (noun) prescribed guide for conduct or action | Synonyms: rule |
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| prescription | (noun) a drug that is available only with written instructions from a doctor or dentist to a pharmacist | Synonyms: ethical drug, prescription drug, prescription medicine |
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| (noun) directions prescribed beforehand; the action of prescribing authoritative rules or directions | - |
| (noun) written instructions from a physician or dentist to a druggist concerning the form and dosage of a drug to be issued to a given patient | - |
| (noun) written instructions for an optician on the lenses for a given person | - |
| prescriptivism | (noun) (linguistics) a doctrine supporting or promoting prescriptive linguistics | - |
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| (noun) (ethics) a doctrine holding that moral statements prescribe appropriate attitudes and behavior | - |
| putrescence | (noun) the quality of rotting and becoming putrid | Synonyms: rottenness |
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| (noun) in a state of progressive putrefaction | Synonyms: corruption, putridness, rottenness |
| putrescine | (noun) a colorless crystalline ptomaine with a foul odor that is produced in decaying animal matter | - |
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| rescission | (noun) (law) the act of rescinding; the cancellation of a contract and the return of the parties to the positions they would have had if the contract had not been made | Synonyms: recission |
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| rescript | (noun) something that has been written again | Synonyms: revision, rewrite |
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| (noun) the act of rewriting something | Synonyms: revisal, revise, revision |
| (noun) a reply by a Pope to an inquiry concerning a point of law or morality | - |
| (noun) a legally binding command or decision entered on the court record (as if issued by a court or judge) | Synonyms: decree, edict, fiat, order |
| rescue | (noun) recovery or preservation from loss or danger | Synonyms: deliverance, delivery, saving |
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| rescuer | (noun) someone who saves something from danger or violence | Synonyms: recoverer, saver |
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| (noun) a person who rescues you from harm or danger | Synonyms: deliverer, savior, saviour |