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All > Healthcare > Medicine > Cancer

  • (RAY-dee-AY-shun) Energy released in the form of particle or electromagnetic waves. Common sources of radiation include radon gas, cosmic rays from outer space, medical x-rays, and energy given off by a radioisotope (unstable form of a chemical element that releases radiation as it breaks down and becomes more stable).

    National Cancer Institute - Cite This Source - This Definition

All > Healthcare > Medicine > Cancer > Breast Cancer

  • (RA'-de-ay'-shun) energy transmitted by waves through space or through some medium' usually referring to electromagnetic radiation when used without a modifier.

    DoD Breast Health Program South - Cite This Source - This Definition

All > Healthcare > Medicine > Cancer > Lung Cancer

All > Science > Astronomy

All > Science > Astronomy > Astrophysics

All > Science > Weather > Climate Change

All > Science > Energy

All > Science > Nuclear Physics

  • Energy emitted in the form of rays, waves, or particles by the atoms and molecules of a radioactive substance as a result of nuclear decay.

    National Tritium Labeling Facility (NTLF) at Lawrence Berkeley National Laboratory (LBNL) - Cite This Source - This Definition

All > Science > Weather

All > Technology > Defense

  • (1) The emission and propagation of waves transmitting energy through space or through some medium; for example, the emission and propagation of electromagnetic, sound, or elastic waves. (2) The energy transmitted by waves through space or some medium; when unqualified, usually refers to electromagnetic radiation. Also known as radiant energy. (3) A stream of particles, such as electrons, neutrons, protons, alpha particles, or high-energy photons, or a mixture of these. (See Ionizing Radiation, Nuclear Radiation, and Thermal Radiation.)

    DoD Missile Defense Agency - Cite This Source - This Definition

All > Technology > Telecommunications

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