1.Definition: (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance

Related Noun(s):actinotherapy, irradiation, radiotherapy

Category: General

2.Definition: a radial arrangement of nerve fibers connecting different parts of the brain

Category: General

3.Definition: energy that is radiated or transmitted in the form of rays or waves or particles

Category: General

4.Definition: 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"

Category: General

5.Definition: the act of spreading outward from a central source

Category: General

6.Definition: the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay

Related Noun(s):radioactivity

Category: General

7.Definition: the spread of a group of organisms into new habitats

Category: General