radiation

Noun

• (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance

• a radial arrangement of nerve fibers connecting different parts of the brain

• the spread of a group of organisms into new habitats

• the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay

• 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 act of spreading outward from a central source

• energy that is radiated or transmitted in the form of rays or waves or particles

Related words

• Synonyms: 
  radiotherapy , radiation therapy , actinotherapy , irradiation , radioactivity , radiation sickness , radiation syndrome