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ion

1

[ ahy-uhn, ahy-on ]

noun

, Physics, Chemistry.
  1. 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 = .
  2. one of the electrically charged particles formed in a gas by electric discharge or the like.


Ion

2

[ ahy-on ]

noun

  1. 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.
  2. (italics) a drama on this subject (415? b.c.) by Euripides.

-ion

3
  1. 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 ).

Ion.

4

abbreviation for

  1. Ionic.

ion

1

/ ˈaɪən; -ɒn /

noun

  1. an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons See also cation anion


-ion

2

suffix forming nouns

  1. indicating an action, process, or state Compare -ation -tion

    creation

    objection

ion

/ īən,īŏn′ /

  1. 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

  1. 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.


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Word History and Origins

Origin of ion1

< Greek ión going, neuter present participle of iénai to go; term introduced by Michael Faraday in 1834

Origin of ion2

< Latin -iōn- (stem of -iō ) suffix forming nouns, especially on past participle stems; replacing Middle English -ioun < Anglo-French < Latin -iōn-

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Word History and Origins

Origin of ion1

C19: from Greek, literally: going, from ienai to go

Origin of ion2

from Latin -iōn- , -io

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Example Sentences

Each molecule of salt contains a pair of ions, atoms with an electrical charge.

The company plans to get around this by instead shuttling the ions themselves around the system.

The other was a reformulation of the material that carries ions between the battery’s cathode and its anode.

Those ions can trigger the mucus to emit bursts of blue light, the team reports.

Lithium salts provide the ions that move through the new electrolyte.

I have previously drawn attention to the cargo aboard Flight 370, which included a large consignment of lithium-ion batteries.

Last week it made five recommendations directed at the testing and certification of lithium-ion batteries.

Lithium-ion batteries will further increase underwater performance.

How can this saga of the lithium-ion batteries be tied to the fate of Flight 370?

A month after that announcement, unaccustomed daylight was forced upon the lithium-ion battery industry.

A merry, happy time the children had, and on reaching Ion the little ones were ready for their supper and bed.

At Ion Grandma Elsie lay quietly sleeping, her three daughters watching over her with tenderest care and solicitude.

In other words, five hydrogen ions passed to the right, while one chloride ion passed to the left.

That is, different concentrations of hydrogen-ion or of hydroxide-ion are required to change their colors.

The second table gives, similarly, the concentrations of hydroxide-ion required to produce the changes of tint indicated.

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