| 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 |
| radioimmunoassay | (noun) immunoassay of a substance that has been radioactively labeled | - |
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| radioisotope | (noun) a radioactive isotope of an element; produced either naturally or artificially | - |
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| radiolarian | (noun) protozoa with amoeba-like bodies and radiating filamentous pseudopods | - |
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| radiolocation | (noun) measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects | Synonyms: microwave radar, radar, radio detection and ranging |
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| radiologist | (noun) a medical specialist who uses radioactive substances and X-rays in the treatment of disease | Synonyms: radiotherapist |
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| radiology | (noun) (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation | Synonyms: radioscopy |
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| (noun) the branch of medical science dealing with the medical use of X-rays or other penetrating radiation | - |
| radiolysis | (noun) molecular disintegration resulting from radiation | - |
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| radiometer | (noun) meter to detect and measure radiant energy (electromagnetic or acoustic) | - |
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| radiomicrometer | (noun) radiometer that is extremely sensitive | - |
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| radiopacity | (noun) opacity to X-rays or other radiation | Synonyms: radio-opacity |
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| radiopharmaceutical | (noun) pharmaceutical consisting of a radioactive compound used in radiation therapy | - |
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| radiophone | (noun) a telephone that communicates by radio waves rather than along cables | Synonyms: radiotelephone, wireless telephone |
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| radiophoto | (noun) a photograph transmitted by radio waves | Synonyms: radiophotograph |
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| 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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| radioprotection | (noun) protection against harmful effects of radiation | - |
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| radioscopy | (noun) (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation | Synonyms: radiology |
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| radiosensitivity | (noun) sensitivity to the action of radiant energy | Synonyms: photosensitivity |
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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 |
| radiotelephone | (noun) a telephone that communicates by radio waves rather than along cables | Synonyms: radiophone, wireless telephone |
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| (noun) telephony that uses transmission by radio rather than by wire | Synonyms: radiotelephony, wireless telephone |
| radiotelephony | (noun) telephony that uses transmission by radio rather than by wire | Synonyms: radiotelephone, wireless telephone |
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| 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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| radiothorium | (noun) radioactive isotope of thorium with mass number 228 | Synonyms: thorium-228 |
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| radish | (noun) pungent fleshy edible root | - |
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| (noun) Eurasian plant widely cultivated for its edible pungent root usually eaten raw | Synonyms: Raphanus sativus |
| (noun) pungent edible root of any of various cultivated radish plants | - |
| (noun) radish of Japan with a long hard durable root eaten raw or cooked | Synonyms: daikon, Japanese radish, Raphanus sativus longipinnatus |
| (noun) a cruciferous plant of the genus Raphanus having a pungent edible root | Synonyms: radish plant |
| radium | (noun) an intensely radioactive metallic element that occurs in minute amounts in uranium ores | Synonyms: atomic number 88, Ra |
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| radius | (noun) support consisting of a radial member of a wheel joining the hub to the rim | Synonyms: spoke, wheel spoke |
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| (noun) the length of a line segment between the center and circumference of a circle or sphere | Synonyms: r |
| (noun) the outer and slightly shorter of the two bones of the human forearm | - |
| (noun) a circular region whose area is indicated by the length of its radius | - |
| (noun) a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere) | - |
| radix | (noun) (numeration system) the positive integer that is equivalent to one in the next higher counting place | Synonyms: base |
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| railroading | (noun) the activity of designing and constructing and operating railroads | Synonyms: rail technology |
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| readiness | (noun) prompt willingness | Synonyms: eagerness, forwardness, zeal |
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| (noun) a natural effortlessness | Synonyms: facility |
| (noun) (psychology) being temporarily ready to respond in a particular way | Synonyms: set |
| (noun) the state of having been made ready or prepared for use or action (especially military action) | Synonyms: preparation, preparedness |
| reading | (noun) the act of measuring with meters or similar instruments | Synonyms: meter reading |
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| (noun) the cognitive process of understanding a written linguistic message | - |
| (noun) a mental representation of the meaning or significance of something | Synonyms: interpretation, version |
| (noun) a datum about some physical state that is presented to a user by a meter or similar instrument | Synonyms: indication, meter reading |
| (noun) written material intended to be read | Synonyms: reading material |
| (noun) a particular interpretation or performance | - |
| (noun) a public instance of reciting or repeating (from memory) something prepared in advance | Synonyms: recital, recitation |
| rollerblading | (noun) skating using Rollerblades | - |
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| sadism | (noun) sexual pleasure obtained by inflicting harm (physical or psychological) on others | - |
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| sadist | (noun) someone who obtains pleasure from inflicting pain on others | - |
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| shadiness | (noun) questionable honesty or legality | - |
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| (noun) relative darkness caused by light rays being intercepted by an opaque body | Synonyms: shade, shadowiness |
| shading | (noun) a gradation involving small or imperceptible differences between grades | Synonyms: blending |
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| (noun) graded markings that indicate light or shaded areas in a drawing or painting | - |
| spadix | (noun) the fleshy axis of a spike often surrounded by a spathe | - |
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| sporadicalness | (noun) The quality of being rare and scattered in occurrence. | - |
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| spreading | (noun) act of extending over a wider scope or expanse of space or time | Synonyms: spread |
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| (noun) the opening of a subject to widespread discussion and debate | Synonyms: airing, dissemination, public exposure |
| (noun) process or result of distributing or extending over a wide expanse of space | Synonyms: spread |
| stadium | (noun) a large structure for open-air sports or entertainments | Synonyms: arena, bowl, sports stadium |
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| steadiness | (noun) the quality of being steady or securely and immovably fixed in place | Synonyms: firmness |
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| (noun) the quality of being steady--regular and unvarying | - |
| (noun) freedom from wavering or indecision; constancy of resolve or conduct | - |
| steradian | (noun) the unit of solid angle adopted under the Systeme International d'Unites | Synonyms: sr |
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| subheading | (noun) a heading of a subdivision of a text | Synonyms: subhead |
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| sulfadiazine | (noun) a sulfa drug used in treating meningitis and pneumonia and other infections | - |
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| taradiddle | (noun) a trivial lie | Synonyms: fib, story, tale, tarradiddle |
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| (noun) pretentious or silly talk or writing | Synonyms: baloney, bilgewater, boloney, bosh, drool, humbug, tarradiddle, tommyrot, tosh, twaddle |
| tarradiddle | (noun) a trivial lie | Synonyms: fib, story, tale, taradiddle |
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| (noun) pretentious or silly talk or writing | Synonyms: baloney, bilgewater, boloney, bosh, drool, humbug, taradiddle, tommyrot, tosh, twaddle |
| threadiness | (noun) The state or quality of consisting of or bearing fibers or filaments. | - |
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| trading | (noun) buying or selling securities or commodities | - |
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| tradition | (noun) an inherited pattern of thought or action | - |
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| (noun) a specific practice of long standing | Synonyms: custom |
| 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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| tribadism | (noun) a form of lesbianism that simulates heterosexual intercourse | - |
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| unloading | (noun) the labor of taking a load of something off of or out of a vehicle or ship or container etc. | - |
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| unnilquadium | (noun) a radioactive transuranic element which has been synthesized | Synonyms: atomic number 104, element 104, Rf, rutherfordium, Unq |
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| unsteadiness | (noun) the quality of not being steady or securely fixed in place | Synonyms: ricketiness |
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| (noun) the quality of being unsteady--varying and unpredictable | - |
| ununquadium | (noun) a radioactive transuranic element, with atomic number 114 | Synonyms: atomic number 114, element 114, Uuq |
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| vanadinite | (noun) a mineral consisting of chloride and vanadate of lead; a source of vanadium | - |
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| vanadium | (noun) a soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite | Synonyms: atomic number 23, V |
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| wadi | (noun) gully or streambed in northern Africa and the Middle East that remains dry except during rainy season | - |
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| wading | (noun) walking with your feet in shallow water | - |
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| xeroradiography | (noun) radiography using X-rays and xerographic (rather than roentgenographic) techniques | - |
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