Tweet. Share this. Radiotherapy or radiation therapy is the general term for the use of radiation in the treatment of disease. Radiotherapy uses ionizing radiation to kill harmful cells in the body. Ionizing radiation can come from many sources, such as x-rays, gamma rays, or proton beams.When used for cancer treatments, radiation kills cancerous cells and shrinks tumors.weet. Share this. Radiotherapy or radiation therapy is the general term for the use of radiation in the treatment of disease. Radiotherapy uses ionizing radiation to kill harmful cells in the body. Ionizing radiation can come from many sources, such as x-rays, gamma rays, or proton beams.
Definition of impediment. 1 : something that impedes; especially : an impairment (as a stutter or a lisp) that interferes with the proper articulation of speech.
The definition of a portent is an omen or sign of something to come. An example of a portent is a black cat crossing your path, which is a sign of bad luck to come. something that portends an event about to occur, esp. an unfortunate event; omen.