| photolithography | (noun) a planographic printing process using plates made from a photographic image | - |
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| photomicrograph | (noun) a photograph taken with the help of a microscope | - |
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| phototelegraph | (noun) an apparatus for transmitting pictures by phototelegraphy. | - |
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| phototelegraphy | (noun) an early technology for the transmission of facsimiles. | - |
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| phototherapy | (noun) the use of strong light to treat acne or hyperbilirubinemia of the newborn | - |
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| physiography | (noun) the study of physical features of the earth's surface | Synonyms: physical geography |
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| physiotherapeutic | (adjective) of or relating to or used in physical therapy | - |
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| physiotherapist | (noun) therapist who treats injury or dysfunction with exercises and other physical treatments of the disorder | Synonyms: physical therapist |
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| physiotherapy | (noun) therapy that uses physical agents: exercise and massage and other modalities | Synonyms: physiatrics, physical therapy |
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| phytotherapy | (noun) the use of plants or plant extracts for medicinal purposes (especially plants that are not part of the normal diet) | Synonyms: botanical medicine, herbal therapy |
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| pictograph | (noun) a graphic character used in picture writing | - |
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| pictographic | (adjective) consisting of or characterized by the use of pictographs | - |
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| planographic | (adjective) of or relating to or involving planography | - |
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| planography | (noun) the process of printing from a surface on which the printing areas are not raised but are ink-receptive (as opposed to ink repellent) | Synonyms: planographic printing |
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| plethysmograph | (noun) a measuring instrument for measuring changes in volume of a part or organ or whole body (usually resulting from fluctuations in the amount of blood it contains) | - |
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| polarographic | (adjective) of or involving polarography | - |
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| polarography | (noun) an electrochemical method of chemical analysis | - |
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| polygraph | (noun) a medical instrument that records several physiological processes simultaneously (e.g., pulse rate and blood pressure and respiration and perspiration) | - |
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| pornographer | (noun) someone who presents shows or sells writing or pictures that are sexually explicit in violation of the community mores | Synonyms: porn merchant |
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| pornographic | (adjective) designed to arouse lust | Synonyms: adult |
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| pornographically | (adverb) in a pornographic manner | - |
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| pornography | (noun) creative activity (writing or pictures or films etc.) of no literary or artistic value other than to stimulate sexual desire | Synonyms: erotica, porn, porno, smut |
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| psychographics | (noun) market research or statistics classifying population groups according to psychological variables (as attitudes, values, or fears); also: variables or trends identified through such research. | - |
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| psychotherapeutic | (adjective) of or relating to or practicing psychotherapy | - |
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| (adjective) emotionally purging | Synonyms: cathartic |
| psychotherapeutics | (noun) the branch of psychiatry concerned with psychological methods | Synonyms: mental hygiene, psychotherapy |
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| psychotherapist | (noun) a therapist who deals with mental and emotional disorders | Synonyms: clinical psychologist |
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| psychotherapy | (noun) the treatment of mental or emotional problems by psychological means | - |
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| (noun) the branch of psychiatry concerned with psychological methods | Synonyms: mental hygiene, psychotherapeutics |
| pyelography | (noun) roentgenography of the kidney and ureters (usually after injection with a radiopaque dye) | - |
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| pyrograph | (noun) a design produced by pyrography | - |
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| pyrographer | (noun) an artist who practices pyrography | - |
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| pyrographic | (adjective) of or relating to or produced by pyrography | - |
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| pyrography | (noun) the act of producing drawings on wood or leather by using heated tools or a fine flame | - |
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| quadraphonic | (adjective) of or relating to quadraphony | Synonyms: quadrasonic, quadriphonic, quadrisonic |
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| quadraphony | (noun) a stereophonic sound recording or reproducing system using four separate channels | Synonyms: quadraphonic system, quadriphonic system |
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| radiograph | (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) | Synonyms: radiogram, shadowgraph, skiagram, skiagraph |
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| radiographer | (noun) a person who makes radiographs | - |
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| radiographic | (adjective) relating to or produced by radiography | - |
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| radiography | (noun) photography that uses other kinds of radiation than visible light | - |
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| (noun) the process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light | Synonyms: skiagraphy |
| radiophotograph | (noun) a photograph transmitted by radio waves | Synonyms: radiophoto |
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| radiophotography | (noun) transmission of photographs by radio waves | - |
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| radiotelegraph | (noun) the use of radio to send telegraphic messages (usually by Morse code) | Synonyms: radiotelegraphy, wireless telegraph, wireless telegraphy |
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| (noun) telegraphy that uses transmission by radio rather than by wire | Synonyms: radiotelegraphy, wireless telegraphy |
| radiotelegraphy | (noun) the use of radio to send telegraphic messages (usually by Morse code) | Synonyms: radiotelegraph, wireless telegraph, wireless telegraphy |
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| (noun) telegraphy that uses transmission by radio rather than by wire | Synonyms: radiotelegraph, wireless telegraphy |
| radiotherapist | (noun) a medical specialist who uses radioactive substances and X-rays in the treatment of disease | Synonyms: radiologist |
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| radiotherapy | (noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance | Synonyms: actinotherapy, irradiation, radiation, radiation therapy |
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| rap | (noun) the act of hitting vigorously | Synonyms: belt, knock, whack, whang |
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| (noun) a reproach for some lapse or misdeed | Synonyms: blame |
| (noun) voluble conversation | - |
| (noun) genre of African-American music of the 1980s and 1990s in which rhyming lyrics are chanted to a musical accompaniment; several forms of rap have emerged | Synonyms: hip-hop, rap music |
| (noun) the sound made by a gentle blow | Synonyms: pat, tap |
| (noun) a gentle blow | Synonyms: strike, tap |
| (verb) talk volubly | - |
| (verb) strike sharply | Synonyms: knap |
| (verb) perform rap music | - |
| (verb) make light, repeated taps on a surface | Synonyms: knock, pink, tap |
| rapacious | (adjective) excessively greedy and grasping | Synonyms: ravening, voracious |
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| (adjective) living by preying on other animals especially by catching living prey | Synonyms: predatory, raptorial, ravening, vulturine, vulturous |
| (adjective) devouring or craving food in great quantities | Synonyms: edacious, esurient, ravening, ravenous, voracious, wolfish |
| rapaciously | (adverb) in a rapacious manner | - |
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| rapaciousness | (noun) extreme gluttony | Synonyms: edacity, esurience, rapacity, voraciousness, voracity |
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| (noun) an excessive desire for wealth (usually in large amounts) | Synonyms: greediness, voraciousness |
| (noun) (of an animal, usually a bird) The quality of subsisting off live prey. | Synonyms: predaceousness, predaciousness, rapacity |
| rapacity | (noun) reprehensible acquisitiveness; insatiable desire for wealth (personified as one of the deadly sins) | Synonyms: avarice, avaritia, covetousness, greed |
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| (noun) extreme gluttony | Synonyms: edacity, esurience, rapaciousness, voraciousness, voracity |
| (noun) (of an animal, usually a bird) The quality of subsisting off live prey. | Synonyms: predaceousness, predaciousness, rapaciousness |
| rape | (noun) the crime of forcing a person to submit to sexual intercourse against his or her will | Synonyms: assault, ravishment, violation |
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| (noun) the act of despoiling a country in warfare | Synonyms: rapine |
| (noun) Eurasian plant cultivated for its seed and as a forage crop | Synonyms: Brassica napus, colza |
| (verb) destroy and strip of its possession | Synonyms: despoil, plunder, spoil, violate |
| (verb) force (someone) to have sex against their will | Synonyms: assault, dishonor, dishonour, outrage, ravish, violate |
| raped | (adjective) having been robbed and destroyed by force and violence | Synonyms: despoiled, pillaged, ravaged, sacked |
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| raper | (noun) someone who forces another to have sexual intercourse | Synonyms: rapist |
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| rapeseed | (noun) seed of rape plants; source of an edible oil | - |
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| raphe | (noun) a ridge that forms a seam between two parts | Synonyms: rhaphe |
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| raphia | (noun) leaf fibers of the raffia palm tree; used to make baskets and mats etc. | Synonyms: raffia |
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| rapid | (adjective) done or occurring in a brief period of time | - |
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| (adjective) characterized by speed; moving with or capable of moving with high speed | Synonyms: speedy |
| (noun) a part of a river where the current is very fast | - |
| rapidity | (noun) a rate that is rapid | Synonyms: celerity, quickness, rapidness, speediness |
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| rapidly | (adverb) with speed | Synonyms: apace, chop-chop, in short order, quickly, speedily |
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| rapidness | (noun) a rate that is rapid | Synonyms: celerity, quickness, rapidity, speediness |
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| rapier | (noun) a straight sword with a narrow blade and two edges | Synonyms: tuck |
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| rapine | (noun) the act of despoiling a country in warfare | Synonyms: rape |
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| rapist | (noun) someone who forces another to have sexual intercourse | Synonyms: raper |
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| rappee | (noun) strong snuff made from dark coarse tobacco | - |
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| rappel | (noun) (mountaineering) a descent of a vertical cliff or wall made by using a doubled rope that is fixed to a higher point and wrapped around the body | Synonyms: abseil |
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| (verb) descend by means of a rappel | Synonyms: abseil, rope down |
| rappeller | (noun) a person who descends down a nearly vertical face by using a doubled rope that is wrapped around the body and attached to some high point | Synonyms: abseiler |
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| rapper | (noun) a device (usually metal and ornamental) attached by a hinge to a door | Synonyms: doorknocker, knocker |
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| (noun) someone who performs rap music | - |
| rapport | (noun) a relationship of mutual understanding or trust and agreement between people | Synonyms: resonance |
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| rapporteur | (noun) a recorder appointed by a committee to prepare reports of the meetings | - |
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| rapprochement | (noun) the reestablishing of cordial relations | Synonyms: reconciliation |
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| rapscallion | (noun) one who is playfully mischievous | Synonyms: imp, monkey, rascal, scalawag, scallywag, scamp |
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| (noun) a deceitful and unreliable scoundrel | Synonyms: knave, rascal, rogue, scalawag, scallywag, varlet |
| rapt | (adjective) feeling great rapture or delight | Synonyms: ecstatic, enraptured, rapturous, rhapsodic |
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| (adjective) giving or marked by complete attention to | Synonyms: absorbed, captive, engrossed, enwrapped, intent, wrapped |
| raptor | (noun) any of numerous carnivorous birds that hunt and kill other animals | Synonyms: bird of prey, raptorial bird |
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| raptorial | (adjective) relating to or characteristic of birds of prey | - |
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| (adjective) living by preying on other animals especially by catching living prey | Synonyms: predatory, rapacious, ravening, vulturine, vulturous |
| rapture | (noun) a state of being carried away by overwhelming emotion | Synonyms: ecstasy, exaltation, raptus, transport |
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| (noun) a state of elated bliss | Synonyms: ecstasy |
| rapturous | (adjective) feeling great rapture or delight | Synonyms: ecstatic, enraptured, rapt, rhapsodic |
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| rapturously | (adverb) in an ecstatic manner | Synonyms: ecstatically, rhapsodically |
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| raptus | (noun) a state of being carried away by overwhelming emotion | Synonyms: ecstasy, exaltation, rapture, transport |
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| (noun) a sudden occurrence (or recurrence) of a disease | Synonyms: ictus, seizure |
| rattrap | (noun) a trap for catching rats | - |
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| (noun) filthy run-down dilapidated housing | - |
| (noun) a difficult entangling situation | - |
| roentgenographic | (adjective) relating to or produced by roentgenography | - |
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| roentgenography | (noun) radiography that uses X-rays to produce a roentgenogram | Synonyms: X-ray photography |
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| sarape | (noun) a long brightly colored shawl; worn mainly by Mexican men | Synonyms: serape |
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| satrap | (noun) a governor of a province in ancient Persia | - |
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| scintigraph | (noun) The apparatus used to make a scintigram. | Synonyms: scintiscanner |
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| scrap | (noun) the act of fighting; any contest or struggle | Synonyms: combat, fight, fighting |
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| (noun) a small piece of something that is left over after the rest has been used | - |
| (noun) a small fragment of something broken off from the whole | Synonyms: bit, chip, flake, fleck |
| (noun) worthless material that is to be disposed of | Synonyms: rubbish, trash |
| (verb) make into scrap or refuse | - |
| (verb) have a disagreement over something | Synonyms: altercate, argufy, dispute, quarrel |
| (verb) dispose of (something useless or old) | Synonyms: junk, trash |
| scrapbook | (noun) an album into which clippings or notes or pictures can be pasted | - |
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| scrape | (noun) an indication of damage | Synonyms: mark, scar, scratch |
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| (noun) a deep bow with the foot drawn backwards (indicating excessive humility) | Synonyms: scraping |
| (noun) a harsh noise made by scraping | Synonyms: scraping, scratch, scratching |
| (noun) an abraded area where the skin is torn or worn off | Synonyms: abrasion, excoriation, scratch |
| (verb) scratch repeatedly | Synonyms: grate |
| (verb) bruise, cut, or injure the skin or the surface of | Synonyms: skin |
| (verb) cut the surface of; wear away the surface of | Synonyms: scratch, scratch up |
| (verb) gather (money or other resources) together over time | Synonyms: come up, scrape up, scratch |
| (verb) make by scraping | - |
| (verb) bend the knees and bow in a servile manner | Synonyms: genuflect, kowtow |
| scraper | (noun) any of various hand tools for scraping | - |
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| scrapheap | (noun) pile of discarded metal | - |
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| (noun) an accumulation of refuse and discarded matter | Synonyms: garbage heap, junk heap, junk pile, refuse heap, rubbish heap, trash heap, trash pile |
| scrapie | (noun) a fatal disease of sheep characterized by chronic itching and loss of muscular control and progressive degeneration of the central nervous system | - |
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| scraping | (noun) a deep bow with the foot drawn backwards (indicating excessive humility) | Synonyms: scrape |
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| (noun) a harsh noise made by scraping | Synonyms: scrape, scratch, scratching |
| (noun) (usually plural) a fragment scraped off of something and collected | - |
| scrapper | (noun) someone who fights (or is fighting) | Synonyms: battler, belligerent, combatant, fighter |
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| scrappily | (adverb) in a bellicose contentious manner | Synonyms: combatively |
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| scrappiness | (noun) the trait of being scrappy and pugnacious | - |
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| (noun) The quality or state of being tenacious, energetic, spunky. | Synonyms: feistiness |
| scrapple | (noun) scraps of meat (usually pork) boiled with cornmeal and shaped into loaves for slicing and frying | - |
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| scrappy | (adjective) full of fighting spirit | - |
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| scraps | (noun) food that is discarded (as from a kitchen) | Synonyms: food waste, garbage, refuse |
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| seismograph | (noun) a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake) | - |
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| seismography | (noun) the measurement of tremors and shocks and undulatory movements of earthquakes | - |
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| semiautobiographical | (adjective) of or relating to a work that combines autobiography and fiction | - |
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| serape | (noun) a long brightly colored shawl; worn mainly by Mexican men | Synonyms: sarape |
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