Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The formation of or separation into ions by heat, electrical discharge, radiation, or chemical reaction.
  • n. The state of being ionized.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. any process that leads to the dissociation of a neutral atom or molecule into charged particles ions; the state of being ionized

from the GNU version of the Collaborative International Dictionary of English

  • n. the process of converting neutral atoms or molecules into ions. The process may occur by dissolving an ionic substance in a dissociating solvent, such as water, or by adding or subtracting an electron to or from an atom or molecule. The latter process occurs, for example, in an electron beam in a mass spectrometer and by interaction of substances with ionizing radiation.

from The Century Dictionary and Cyclopedia

  • n. In physical chemistry: The electrolytic dissociation of an electrolyte by solution or by fusion.
  • n. The process by which a gas is converted into a conductor of electricity; the state or condition of being ionized. See electron, 2, electron theory.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the condition of being dissociated into ions (as by heat or radiation or chemical reaction or electrical discharge)
  • n. the process of ionizing; the formation of ions by separating atoms or molecules or radicals or by adding or subtracting electrons from atoms by strong electric fields in a gas

Etymologies

ionize +‎ -ation (Wiktionary)

Examples

  • This process is called ionization, which is why it is named "ionizing radiation."

    Public Health Statement for Ionizing Radiation

  • His systematic measurements showed that a decrease in ionization did occur up to

    Nobel Prize in Physics 1936 - Presentation Speech

  • As I was able to observe no reduction in ionization during the eclipse I decided that, essentially, the sun could not be the source of cosmic rays, at least as far as undeflected rays were concerned.

    Victor F. Hess - Nobel Lecture

  • Consequently radio waves will either be thrown back towards the earth or, if they are strong enough to penetrate to the middle of the layer where the ionization is greatest, they will rum through it and out into space.

    Nobel Prize in Physics 1947 - Presentation Speech

  • The resulting ions and electrons are accelerated by the electric field around the wire, causing a cascade of ionization, which is collected on the wire, giving an electric current proportional to the energy of the original particle.

    Georges Charpak obituary

  • They look at the total ionization, which is the number of electrons knocked out from their atoms.

    Still nothing detected

  • The removal of an electron from the surface of an atom - that is, the ionization of the atom - means a fundamental structural change in its surface layer.

    Johannes Stark - Nobel Lecture

  • This phenomenon, which is called ionization, is produced also by X-rays and investigation of it in connection with them had made known its principal characteristics.

    Pierre Curie

  • Among its advantages, MEG is more efficient and can occur with lower-energy photons in the visible region of the solar spectrum compared to a multiplication process of charge carriers in bulk semiconductors (a process called impact ionization, which is generally restricted to the ultraviolet region where solar photons are absent or scarce).

    PhysOrg.com - latest science and technology news stories

  • At this time in the early universe, a haze of hydrogen gas was everywhere, but radiation from primeval galaxies was causing a process called ionization that changed the nature of the hydrogen.

    Reuters: Top News

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