What is the meaning of radiation?

noun

• Energy that is radiated or transmitted in the form of rays or waves or particles.
• The act of spreading outward from a central source.
• 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.
  • usage: "he was suffering from radiation"
  • synonyms: radiation sickness, radiation syndrome
• The spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay.
  • synonyms: radioactivity
• The spread of a group of organisms into new habitats.
• A radial arrangement of nerve fibers connecting different parts of the brain.
• Medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance. (.
  • synonyms: radiotherapy, radiation therapy, actinotherapy, irradiation