the act of spreading outward from a central source中心源から外側へ広がる行為輻射
energy that is radiated or transmitted in the form of rays or waves or particles光線、波動、または粒子の形で放射、あるいは伝達されるエネルギー輻射
the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay原子核崩壊において粒子の流れまたは電磁波の自然放出輻射
(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance放射性物質へ露出させることによる病気の治療(特にがん)照射法
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"電離放射線への露出(例えば、放射性化学製品、あるいは核爆発への露出)から生じる症候群原子病