[ US /ˌɹeɪdiˈeɪʃən/ ]
[ UK /ɹˌe‍ɪdɪˈe‍ɪʃən/ ]
  1. the spread of a group of organisms into new habitats
  2. 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
  3. energy that is radiated or transmitted in the form of rays or waves or particles
  4. a radial arrangement of nerve fibers connecting different parts of the brain
  5. the act of spreading outward from a central source
  6. the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
  7. (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
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How To Use radiation In A Sentence

  • It may absorb radiation and change its internal energy states.
  • If a person drank water contaminated to a level of 75,000 picocuries per liter for an entire year, they would receive an internal radiation dose of about 16 mrem, which is far below the natural variations in the average annual dose of 360 mrem in the US. Atomic Insights Blog
  • The pills—containing inexpensive potassium iodide, which is the substance used to iodize common table salt—can prevent thyroid cancer by saturating the thyroid gland with a harmless type of iodine, keeping it from absorbing radioactive iodine that might be inhaled or ingested after a radiation release. Quake Renews Call to Enforce Pill Law
  • Heat will only leave the container by radiation, convection and conduction if the temperature of the container is higher than the surroundings.
  • This inversion technique takes into account atmospheric effects on the radiation and spatial variations in the surface emissivity and backscatter.
  • Patients received a conditioning regimen that consisted of total body irradiation (1375 cGy in 11 fractions) with partial lung shielding, thiotepa (10 mg/kg), cyclophosphamide (120 mg/kg), and rabbit antithymocyte globulin (1.5 mg/kg). EurekAlert! - Breaking News
  • The companion star would emit plenty of its own UV radiation, but this radiation would be blocked in the direction of Eta Carinae by the thick nebulosity of the giant star's surrounding gas, dust, and stellar wind.
  • Methods: With infrared ray sensor and PLC, to control radiation protection door.
  • It stated further that “during radiation, patient had an acute left-sided hemiparesis requiring wheelchair at home.” Manifesting Michelangelo
  • The space radiation environment encompasses a broad spectrum of radiation ranging from infra-red to galactic cosmic radiation.
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