| radiation |
energy that is radiated or transmitted in the form of rays or waves or particles the act of spreading outward from a central source radiation sickness: syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours; "he was suffering from radiation" the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay the spread of a group of organisms into new habitats a radial arrangement of nerve fibers connecting different parts of the brain radiotherapy: (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
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| radio frequency |
an electromagnetic wave frequency between audio and infrared
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| radio- |
medium for communication radio receiver: an electronic receiver that detects and demodulates and amplifies transmitted signals transmit messages via radio waves; "he radioed for help" a communication system based on broadcasting electromagnetic waves indicating radiation or radioactivity; "radiochemistry"
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| radio-opacity |
radiopacity: opacity to X-rays or other radiation
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| radiocarpal joint |
wrist: a joint between the distal end of the radius and the proximal row of carpal bones
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