Definition of Ion

1. Noun. A particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons.

Specialized synonyms: Anion, Cation
Generic synonyms: Particle, Subatomic Particle
Derivative terms: Ionate, Ionic, Ionise, Ionize

Definition of Ion

1. n. One of the elements which appear at the respective poles when a body is subjected to electro-chemical decomposition. Cf. Anion, Cation.

2. n. One of the electrified particles into which, according to the electrolytic dissociation theory, the molecules of electrolytes are divided by water and other solvents. An ion consists of one or more atoms and carries a unit charge of electricity, 3.4 x 10-10 electrostatic units, or a multiple of this. Those which are positively electrified (hydrogen and the metals) are called cations; negative ions (hydroxyl and acidic atoms or groups) are called anions.

Definition of Ion

1. Noun. An atom or group of atoms bearing an electrical charge such as the sodium and chlorine atoms in a salt solution. ¹

¹ Source:

Definition of Ion

1. an electrically charged atom [n -S]

Medical Definition of Ion

1. Atomic particle, atom or chemical radical bearing an electric charge, either negative or positive. (16 Dec 1997)

Lexicographical Neighbors of Ion

iodoxybenzoic acid
ioglycamic acid
ion (current term)
ion-selective electrode
ion-selective electrodes
ion-selective membrane
ion beam
ion carrier
ion channel
ion channel gating
ion channelopathy
ion channels
ion cyclotron emission
ion diode
ion engine
ion engines
ion exchange

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