ion
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.
Origin of ion
1Other definitions for Ion (2 of 4)
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.
Other definitions for -ion (3 of 4)
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).
Origin of -ion
3Other definitions for Ion. (4 of 4)
Ionic.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use ion in a sentence
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.
NTSB Doesn’t Think the Boeing 787 Dreamliner Is Safe Enough to Fly | Clive Irving | May 28, 2014 | THE DAILY BEASTLithium-ion batteries will further increase underwater performance.
How can this saga of the lithium-ion batteries be tied to the fate of Flight 370?
Passenger Flights Must Stop Carrying Lithium-Ion Batteries as Cargo | Clive Irving | May 5, 2014 | THE DAILY BEASTA month after that announcement, unaccustomed daylight was forced upon the lithium-ion battery industry.
Passenger Flights Must Stop Carrying Lithium-Ion Batteries as Cargo | Clive Irving | May 5, 2014 | THE DAILY BEAST
A merry, happy time the children had, and on reaching ion the little ones were ready for their supper and bed.
Elsie's Vacation and After Events | Martha FinleyAt ion Grandma Elsie lay quietly sleeping, her three daughters watching over her with tenderest care and solicitude.
Elsie's Vacation and After Events | Martha FinleyIn other words, five hydrogen ions passed to the right, while one chloride ion passed to the left.
The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2. | Julius StieglitzThat is, different concentrations of hydrogen-ion or of hydroxide-ion are required to change their colors.
The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2. | Julius StieglitzThe second table gives, similarly, the concentrations of hydroxide-ion required to produce the changes of tint indicated.
The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2. | Julius Stieglitz
British Dictionary definitions for ion (1 of 2)
/ (ˈaɪən, -ɒn) /
Origin of ion
1British Dictionary definitions for -ion (2 of 2)
Origin of -ion
2Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for ion
[ ī′ən, ī′ŏn′ ]
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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for ion
[ (eye-uhn, eye-on) ]
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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