| oceanographer | (noun) a scientist who studies physical and biological aspects of the seas | - |
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| oceanography | (noun) the branch of science dealing with physical and biological aspects of the oceans | Synonyms: oceanology |
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| oleography | (noun) the art or process of producing chromolithographs printed on cloth to imitate an oil painting. | - |
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| orograph | (noun) A machine for use in making topographical maps. | - |
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| orography | (noun) the science of mountains | Synonyms: orology |
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| orthography | (noun) a method of representing the sounds of a language by written or printed symbols | Synonyms: writing system |
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| oscillogram | (noun) the recording produced by an oscillograph | - |
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| oscillograph | (noun) a device for making a record of the wave forms of fluctuating voltages or currents | - |
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| palaeoethnography | (noun) the ethnography of paleolithic humans | Synonyms: paleoethnography |
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| palaeogeography | (noun) the study of the geography of ancient times or ancient epochs | Synonyms: paleogeography |
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| paleoethnography | (noun) the ethnography of paleolithic humans | Synonyms: palaeoethnography |
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| paleogeography | (noun) the study of the geography of ancient times or ancient epochs | Synonyms: palaeogeography |
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| paleographer | (noun) an archeologist skilled in paleography | Synonyms: paleographist |
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| paleographist | (noun) an archeologist skilled in paleography | Synonyms: paleographer |
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| paleography | (noun) the study of ancient forms of writing (and the deciphering of them) | - |
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| palsgrave | (noun) (Middle Ages) the lord of a palatinate who exercised sovereign powers over his lands | Synonyms: palatine |
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| pantograph | (noun) mechanical device used to copy a figure or plan on a different scale | - |
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| parabolograph | (noun) An outdated instrument for drawing parabolas. | - |
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| paragram | (noun) a pun made by changing the letters of a word, especially the initial letter. | - |
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| paragraph | (noun) one of several distinct subdivisions of a text intended to separate ideas; the beginning is usually marked by a new indented line | - |
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| paragrapher | (noun) a writer of paragraphs (as for publication on the editorial page of a newspaper) | - |
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| parallelogram | (noun) a quadrilateral whose opposite sides are both parallel and equal in length | - |
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| paygrade | (noun) rank in a military organization | Synonyms: military rank, military rating, rating |
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| pellagra | (noun) a disease caused by deficiency of niacin or tryptophan (or by a defect in the metabolic conversion of tryptophan to niacin); characterized by gastrointestinal disturbances and erythema and nervous or mental disorders; may be caused by malnutrition or alcoholism or other nutritional impairments | Synonyms: Alpine scurvy, maidism, mal de la rosa, mal rosso, mayidism, Saint Ignatius' itch |
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| pentagram | (noun) a star with 5 points; formed by 5 straight lines between the vertices of a pentagon and enclosing another pentagon | Synonyms: pentacle, pentangle |
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| phlebogram | (noun) an X ray of a vein injected with a radiopaque contrast medium | Synonyms: venogram |
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| phonogram | (noun) any written symbol standing for a sound or syllable or morpheme or word | - |
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| phonograph | (noun) machine in which rotating records cause a stylus to vibrate and the vibrations are amplified acoustically or electronically | Synonyms: record player |
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| photoengraving | (noun) an engraving used to reproduce an illustration | Synonyms: halftone, halftone engraving |
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| photograph | (noun) a representation of a person or scene in the form of a print or transparent slide or in digital format | Synonyms: exposure, photo, pic, picture |
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| photographer | (noun) someone who takes photographs professionally | Synonyms: lensman |
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| photography | (noun) the act of taking and printing photographs | Synonyms: picture taking |
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| (noun) the occupation of taking and printing photographs or making movies | - |
| (noun) the process of producing images of objects on photosensitive surfaces | - |
| photogravure | (noun) using photography to produce a plate for printing | Synonyms: rotogravure |
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| (noun) an intaglio print produced by gravure | Synonyms: gravure, heliogravure |
| (noun) printing from an intaglio plate prepared by photographic methods | - |
| photoheliograph | (noun) a telescope, with a camera attached, used to photograph the Sun. | - |
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| photolithograph | (noun) a lithograph produced by photographically produced plates | - |
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| 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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| physiography | (noun) the study of physical features of the earth's surface | Synonyms: physical geography |
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| pictograph | (noun) a graphic character used in picture writing | - |
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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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| plantigrade | (noun) an animal that walks with the entire sole of the foot touching the ground as e.g. bears and human beings | Synonyms: plantigrade mammal |
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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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| pneumoencephalogram | (noun) an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast | Synonyms: encephalogram |
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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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| pomegranate | (noun) large globular fruit having many seeds with juicy red pulp in a tough brownish-red rind | - |
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| (noun) shrub or small tree native to southwestern Asia having large red many-seeded fruit | Synonyms: pomegranate tree, Punica granatum |
| 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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| 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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| postgraduate | (noun) a student who continues studies after graduation | Synonyms: grad student, graduate student |
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| primigravida | (noun) (obstetrics) a woman who is pregnant for the first time | Synonyms: gravida I |
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| program | (noun) a performance (or series of performances) at a public presentation | Synonyms: programme |
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| (noun) a series of steps to be carried out or goals to be accomplished | Synonyms: plan, programme |
| (noun) a system of projects or services intended to meet a public need | Synonyms: programme |
| (noun) an announcement of the events that will occur as part of a theatrical or sporting event | Synonyms: programme |
| (noun) a radio or television show | Synonyms: broadcast, programme |
| (noun) (computer science) a sequence of instructions that a computer can interpret and execute | Synonyms: computer program, computer programme, programme |
| (noun) a document stating the aims and principles of a political party | Synonyms: platform, political platform, political program |
| (noun) an integrated course of academic studies | Synonyms: course of study, curriculum, programme, syllabus |
| programing | (noun) creating a sequence of instructions to enable the computer to do something | Synonyms: computer programing, computer programming, programming |
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| (noun) setting an order and time for planned events | Synonyms: programming, scheduling |
| programma | (noun) an edict that has been publicly posted | - |
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| programmability | (noun) the abstract capability of being programmable. | - |
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| programme | (noun) a performance (or series of performances) at a public presentation | Synonyms: program |
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| (noun) a series of steps to be carried out or goals to be accomplished | Synonyms: plan, program |
| (noun) a system of projects or services intended to meet a public need | Synonyms: program |
| (noun) an announcement of the events that will occur as part of a theatrical or sporting event | Synonyms: program |
| (noun) a radio or television show | Synonyms: broadcast, program |
| (noun) (computer science) a sequence of instructions that a computer can interpret and execute | Synonyms: computer program, computer programme, program |
| (noun) an integrated course of academic studies | Synonyms: course of study, curriculum, program, syllabus |
| programmer | (noun) a person who designs and writes and tests computer programs | Synonyms: coder, computer programmer, software engineer |
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| programming | (noun) creating a sequence of instructions to enable the computer to do something | Synonyms: computer programing, computer programming, programing |
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| (noun) setting an order and time for planned events | Synonyms: programing, scheduling |
| 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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| pyelogram | (noun) an X ray of the kidneys and ureters | - |
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| 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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| pyrography | (noun) the act of producing drawings on wood or leather by using heated tools or a fine flame | - |
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| quackgrass | (noun) European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed | Synonyms: Agropyron repens, couch grass, dog grass, quack grass, quick grass, witch grass, witchgrass |
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| radiogram | (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) | Synonyms: radiograph, shadowgraph, skiagram, skiagraph |
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| (noun) a message transmitted by wireless telegraphy | - |
| 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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| 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 |
| ribgrass | (noun) an Old World plantain with long narrow ribbed leaves widely established in temperate regions | Synonyms: buckthorn, English plantain, narrow-leaved plantain, Plantago lanceolata, ribwort, ripple-grass |
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| ricegrass | (noun) any grass of the genus Oryzopsis | Synonyms: rice grass |
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| roentgenogram | (noun) a radiogram made by exposing photographic film to X rays; used in medical diagnosis | Synonyms: X-ray, X-ray photograph, X-ray picture, X ray |
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| roentgenography | (noun) radiography that uses X-rays to produce a roentgenogram | Synonyms: X-ray photography |
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| rotogravure | (noun) using photography to produce a plate for printing | Synonyms: photogravure |
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| (noun) printing by transferring an image from a photogravure plate to a cylinder in a rotary press | - |
| (noun) printed material (text and pictures) produced by an intaglio printing process in a rotary press | - |
| ryegrass | (noun) any of several annual or perennial Eurasian grasses | Synonyms: rye grass |
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| scapegrace | (noun) a reckless and unprincipled reprobate | Synonyms: black sheep |
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| scintigram | (noun) a recording of the radioactivity emitted by a tracer in an organism or organ system. | - |
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| scintigraph | (noun) The apparatus used to make a scintigram. | Synonyms: scintiscanner |
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| seagrass | (noun) any of various seaweeds that grow underwater in shallow beds | - |
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| secundigravida | (noun) a woman who is pregnant for the second time | Synonyms: gravida II |
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| seismogram | (noun) the graphical record of an earth tremor made by using a seismograph | - |
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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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| serigraph | (noun) a print made using a stencil process in which an image or design is superimposed on a very fine mesh screen and printing ink is squeegeed onto the printing surface through the area of the screen that is not covered by the stencil | Synonyms: silk screen print, silkscreen |
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| serigraphy | (noun) the act of making a print by the silkscreen method | - |
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| sgraffito | (noun) a ceramic or mural decoration made by scratching off a surface layer to reveal the ground | - |
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| shadowgraph | (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) | Synonyms: radiogram, radiograph, skiagram, skiagraph |
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| shortgrass | (noun) any of various grasses that are short and can tolerate drought conditions; common on the dry upland plains just east of the Rocky Mountains | Synonyms: short-grass |
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| silkgrass | (noun) valuable forage grass of dry upland areas and plains of western North America to northern Mexico | Synonyms: Indian millet, mountain rice, Oryzopsis hymenoides, silk grass |
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| skiagram | (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) | Synonyms: radiogram, radiograph, shadowgraph, skiagraph |
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| skiagraph | (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) | Synonyms: radiogram, radiograph, shadowgraph, skiagram |
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| skiagraphy | (noun) the process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light | Synonyms: radiography |
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| sonogram | (noun) an image of a structure that is produced by ultrasonography (reflections of high-frequency sound waves); used to observe fetal growth or to study bodily organs | Synonyms: echogram |
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| sonograph | (noun) an instrument that uses the differential transmission and reflection of ultrasonic waves in order to provide an image of a bodily organ | - |
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| sonography | (noun) using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs | Synonyms: echography, ultrasonography, ultrasound |
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