Skip to definition.
Get the FREE one-click dictionary software for Windows.
NEW iPhone Audio English dictionary


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

Derived forms: ions

See also: ionate, ionic, ionize, nonionic

Type of: particle, subatomic particle

Encyclopedia: Ion

Nearest

iodized
iodoamino acid
iodochlorhydroxyquin
iodocompound
iodoform
iodoprotein
iodopsin
iodothyronine
iodotyrosine
IOL
ion
ion beam
ion engine
ion exchange
ion pump
ionate
Ionesco
Ionia
Ionian
Ionian order
Ionian Sea