[ahy-uh n, ahy-on] /ˈaɪ ən, ˈaɪ ɒn/
noun, Physics, Chemistry.
an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons, as a cation (positive ion) which is created by electron loss and is attracted to the cathode in electrolysis, or as an anion (negative ion) which is created by an electron gain and is attracted to the anode. The valence of an ion is equal to the number of electrons lost or gained and is indicated by a plus sign for cations and a minus sign for anions, thus: Na + , Cl−, Ca ++ , S = .
one of the electrically charged particles formed in a gas by electric discharge or the like.
[ahy-on] /ˈaɪ ɒn/
Classical Mythology. the eponymous ancestor of the Ionians: a son of Apollo and Creusa who is abandoned by his mother but returns to become an attendant in Apollo’s temple at Delphi.
(italics) a drama on this subject (415? b.c.) by Euripides.
a suffix, appearing in words of Latin origin, denoting action or condition, used in Latin and in English to form nouns from stems of Latin adjectives (communion; union), verbs (legion; opinion), and especially past participles (allusion; creation; fusion; notion; torsion).
an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons See also cation, anion
indicating an action, process, or state: creation, objection Compare -ation, -tion
1834, introduced by English physicist and chemist Michael Faraday (suggested by the Rev. William Whewell, English polymath), coined from Greek ion, neuter present participle of ienai “go,” from PIE root *ei- “to go, to walk” (cf. Greek eimi “I go;” Latin ire “to go,” iter “a way;” Old Irish ethaim “I go;” Irish bothar “a road” (from *bou-itro- “cows’ way”), Gaulish eimu “we go,” Gothic iddja “went,” Sanskrit e’ti “goes,” imas “we go,” ayanam “a going, way;” Avestan ae’iti “goes;” Old Persian aitiy “goes;” Lithuanian eiti “to go;” Old Church Slavonic iti “go;” Bulgarian ida “I go;” Russian idti “to go”). So called because ions move toward the electrode of opposite charge.
suffix forming nouns of state, condition, or action from verbs, from Latin -ionem (nominative -io), sometimes via French -ion.
ion i·on (ī’ən, ī’ŏn’)
An atom or a group of atoms that has acquired a net electric charge by gaining or losing one or more electrons.
An atom or a group of atoms that has an electric charge. Positive ions, or cations, are formed by the loss of electrons; negative ions, or anions, are formed by the gain of electrons.
ion [(eye-uhn, eye-on)]
An atom that has either lost or gained one or more electrons, so that it has an electrical charge. Ions can be either positively or negatively charged.
Institute of Nutrition
[ahy-oh-nuh] /aɪˈoʊ nə/ noun 1. an island in the Hebrides, off the W coast of Scotland: center of early Celtic Christianity. /aɪˈəʊnə/ noun 1. an island off the W coast of Scotland, in the Inner Hebrides: site of St Columba’s monastery (founded in 563) and an important early centre of Christianity. Area: 854 ha (2112 […]
abbreviation 1. Indian Ocean National Association for Regional Cooperation
noun, Physics. 1. . noun, Physics. 1. an apparatus for detecting and analyzing ionizing radiation, consisting of a vessel filled with a gas at normal or lower than normal pressure and fitted with two electrodes such that the current between the electrodes is a function of the amount of ionization of the gas. noun 1. […]
- Ion engine
noun 1. a type of rocket engine in which thrust is obtained by the electrostatic acceleration of charged positive ions Compare plasma engine ion engine A rocket engine that develops thrust by expelling ions fired by an electron gun, used in some spacecraft. Though ion engines create less thrust than chemical combustion engines, they are […]