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ion
ionnounan 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 = .
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Ion
Ionnounthe 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.
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-ion
-iona 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 ).
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Ion.
Ion.abbreviationIonic.
ion
1 Americannoun
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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 = .
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one of the electrically charged particles formed in a gas by electric discharge or the like.
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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.
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(italics) a drama on this subject (415? b.c.) by Euripides.
abbreviation
noun
suffix
Etymology
Origin of ion1
< Greek ión going, neuter present participle of iénai to go; term introduced by Michael Faraday in 1834
Origin of -ion3
< Latin -iōn- (stem of -iō ) suffix forming nouns, especially on past participle stems; replacing Middle English -ioun < Anglo-French < Latin -iōn-
Explanation
An ion is an atom or particle with a positive or negative electrical charge. Think of an ion as having a plus or minus sign. Ion is a word you are most likely to encounter in a physics or chemistry text. But you don’t have to be a chemist or physicist to understand the concept. If you had a neutral particle and you were able to remove or add an electron, then you would have an ion — a charged particle. Don't confuse the tiny ion with the similar word eon, which is an extremely long period of time.
Vocabulary lists containing ion
Electricity and Magnetism - Introductory
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Structure and Properties of Matter - Middle School
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Chemistry: Structure and Properties of Matter
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Late last year, the league unveiled a $240-million media rights deal with CBS, ESPN, Amazon Prime Video and Scripps’ network ION, which has been central to expanding the league’s revenue and visibility.
From Los Angeles Times • Jul. 17, 2024
The league will have 118 matches aired across CBS Sports, ESPN, Prime Video and ION Network.
From Seattle Times • Nov. 9, 2023
Each Saturday night will include a double-header on Scripps’ over-the-air ION network.
From Washington Times • Nov. 9, 2023
“It was formulated by using the latest A.I. Technology using Quantum computing and ION Science,” reads another.
From Slate • Jun. 8, 2023
ION: 'Bend gently,' he says, 'in the polished chariot to the left of them, and urge the horse on the right hand with whip and voice; and slacken the rein.
From Ion by Jowett, Benjamin
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.