īˈonizer or īˈoniser noun

An electrical apparatus that contributes to clearing the air by restoring to it the negative charges destroyed by pollution, air-conditioning, etc

ionˈomer noun

The product of ionic bonding action between long-chain molecules, characterized by toughness and a high degree of transparency

ionˈopause noun

The region of the earth's atmosphere at the outer limit of the ionosphere

ionophore /īˈə-nə-för/ noun

A chemical compound able to combine with an ion and enable it to pass through a cell membrane, etc

ionophorēˈsis noun

Electrophoresis, esp of small ions

ionˈosphere noun

The region of the upper atmosphere that includes the highly ionized Appleton and Kennelly-Heaviside layers

ionospherˈic adjective

ionotropˈic adjective (biochemistry)

Denoting a neurotransmitter receptor which affects cell activity by regulating the cell's ion channels (cf metabotropic under metabolism)

iontophorēˈsis noun

1. The migration of charged particles, eg of a drug, into body tissue through electric currents
2. Electrophoresis

iontophoretˈic adjective

ion channel noun (biochemistry)

A pore in a cell membrane that allows movement of ions into and out of the cell

ion engine noun

A space engine in which the thrust is produced by a stream of ionized particles

iˈon-exchange noun

Transfer of ions from a solution to a solid or another liquid, used in water-softening and many industrial processes

ionic bond noun

A bond within a chemical compound achieved by transfer of electrons, the resulting ions being held together by electrostatic attraction

ion implantation noun

The introduction of ions into a crystalline material by subjecting the material to bombardment with a stream of ions, an important element in the production of integrated circuits

ion implanter noun

ionization chamber noun

An instrument used to detect and measure ionizing radiation, consisting of an enclosure containing electrodes between which ionized gas is formed

ionization potential noun

The energy, in electronvolts, required to detach an electron from an atom, molecule or radical

ionizing radiation noun

Any electromagnetic or particulate radiation which can cause ionization