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

Hypernym(s): energy, free_energy

· the act of spreading outward from a central source

Hypernym(s): emission, emanation

· 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"

Synonym(s): radiation_sickness, radiation_syndrome

Hypernym(s): syndrome

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

Synonym(s): radioactivity

Hypernym(s): emission

· the spread of a group of organisms into new habitats

Hypernym(s): natural_process, natural_action, action, activity, spread, spreading

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

Hypernym(s): neural_structure

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

Synonym(s): radiotherapy, radiation_therapy, actinotherapy, irradiation

Hypernym(s): therapy