Usually means: Atom with unequal electrons, charged.
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We found 75 dictionaries that define the word ion:

General (27 matching dictionaries)
  1. Ion, -ion, ion: Merriam-Webster.com
  2. Ion, -ion, ion: Oxford Learner's Dictionaries
  3. Ion, ion: American Heritage Dictionary of the English Language
  4. -ion, ion: Collins English Dictionary
  5. ion: Vocabulary.com
  6. Ion, -ion, ion, iOn: Wordnik
  7. -ion, ion: Cambridge Advanced Learner's Dictionary
  8. Ion, -ion, ion: Wiktionary
  9. -ion, ion: Webster's New World College Dictionary, 4th Ed.
  10. -ion, ion: The Wordsmyth English Dictionary-Thesaurus
  11. ion: Infoplease Dictionary
  12. ION, Ion, -ion: Dictionary.com
  13. ion: Online Etymology Dictionary
  14. ion: Cambridge Essential American English Dictionary
  15. I.O.N, I.O.N (manga), ION (satellite), ION, Ion (DC Comics), Ion (Greece), Ion (chocolate), Ion (comics), Ion (dialogue), Ion (disambiguation), Ion (mythology), Ion (name), Ion (paintball marker), Ion (physics), Ion (play), Ion (rapper), Ion (serialization format), Ion (window manager), Ion: Wikipedia, the Free Encyclopedia
  16. Ion, -ion: Online Plain Text English Dictionary
  17. ion: Webster's Revised Unabridged, 1913 Edition
  18. ion: Rhymezone
  19. Ion: AllWords.com Multi-Lingual Dictionary
  20. -ion, ion: MyWord.info
  21. Ion, ion: Stammtisch Beau Fleuve Acronyms
  22. ion: Free Dictionary
  23. ion: Mnemonic Dictionary
  24. Ion, ion: LookWAYup Translating Dictionary/Thesaurus
  25. Ion, ion: Dictionary/thesaurus

Business (2 matching dictionaries)
  1. Construction Term Glossary (No longer online)
  2. BusinessDictionary.com (No longer online)

Computing (2 matching dictionaries)
  1. ION: Netlingo
  2. Ion (chemistry), Ion (physics), Ion (prophet), ion: Encyclopedia

Medicine (9 matching dictionaries)
  1. Dorland's Illustrated Medical Dictionary (No longer online)
  2. Ion: MedFriendly Glossary
  3. online medical dictionary (No longer online)
  4. Hepatitis C Information Central (No longer online)
  5. Medical Device Glossary of Terms (No longer online)
  6. DICTIONARY OF TERMS IN ORAL PHYSIOLOGY (No longer online)
  7. ion: Dictionary of Cancer Terms
  8. Ion (chemistry), Ion (physics), -ion, ion: Medical dictionary
  9. WeMove Glossary of Terms (No longer online)

Miscellaneous (3 matching dictionaries)
  1. ION: Acronym Finder
  2. ION: Three Letter Words with definitions
  3. AbbreviationZ (No longer online)

Science (17 matching dictionaries)
  1. ion: Dictionary of Botanical Epithets
  2. Electrochemistry Dictionary (No longer online)
  3. From Stargazers to Starships Glossary (No longer online)
  4. Chemistry Dictionary (No longer online)
  5. Drug Discovery and Development (No longer online)
  6. Ion: Biology dictionary
  7. Ion: Eric Weisstein's World of Chemistry
  8. Ion: Eric Weisstein's World of Physics
  9. Illustrated Glossary of Geologic Terms (No longer online)
  10. Ion: Extragalactic Astronomy
  11. General Chemistry Online (No longer online)
  12. Glossary of Roots of Botanical Names (No longer online)
  13. Ion: NRC Glossary of Nuclear Terms --
  14. Accelerator Glossary (No longer online)
  15. ion: Natural History Terms
  16. AGRICULTURAL AND ENVIRONMENTAL BIOTECHNOLOGY (No longer online)
  17. ION: Zoom Astronomy Glossary

Slang (1 matching dictionary)
  1. ion: Urban Dictionary

Tech (14 matching dictionaries)
  1. ION: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING
  2. ion: Electronics
  3. AUTOMOTIVE TERMS (No longer online)
  4. Basics of Space Flight Glossary (No longer online)
  5. ION: Energy Terms
  6. Ion: Gems and Precious Stones
  7. Glossary of Meteorology (No longer online)
  8. Explosives (No longer online)
  9. ion: Canadian Soil Information System
  10. Lake and Water Word Glossary (No longer online)
  11. Glossary of Energy Terms (No longer online)
  12. ION: Power Engineering
  13. Nuclear Terms (No longer online)
  14. ion: Webster's New World Telecom Dictionary

(Note: See ions as well.)

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Definitions from Wiktionary (
)
American English Definition British English Definition
▸ noun:  An atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution.
▸ noun:  (Greek mythology) Son of Creusa and Xuthus, and the ancestor of Ionian people.
▸ noun:  (philosophy) Ion of Chios, a Greek writer, dramatist, lyric poet and philosopher of the Pythagorean school
▸ noun:  A surname from Romanian.

Similar:
cation, anion, electron, proton, valence electron, polybromide, electrovalency, sulphion, thermion, monoacid, more...

Opposite:
creation, beginning, start, initiation, origin

Types:
cation, anion, hydrogen ion, hydroxide ion, sulfate ion, sulfide ion, sulfite ion, more...

Phrases:
ion exchange, ion concentration, hydrogen ion, Ion beam, ion channels, more...

Adjectives:
positive, negative, molecular, complex, heavy, free, central, single, ferric, common, metal

Colors:
    neon green,     neon pink,     neon blue,     neon yellow,     neon purple,     neon red,     neon cyan,     neon fuchsia


▸ Word origin

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Similar:
cation, anion, electron, proton, valence electron, polybromide, electrovalency, sulphion, thermion, monoacid, more...

Opposite:
creation, beginning, start, initiation, origin

Types:
cation, anion, hydrogen ion, hydroxide ion, sulfate ion, sulfide ion, sulfite ion, more...

Phrases:
ion exchange, ion concentration, hydrogen ion, Ion beam, ion channels, Ion source, Ion implantation, ion transport, chloride ion, positive ion, ion channel, negative ion, calcium ion, ion current, sodium ion, more...

Adjectives:
positive, negative, molecular, complex, heavy, free, central, single, ferric, common, metal

Colors:
    neon green,     neon pink,     neon blue,     neon yellow,     neon purple,     neon red,     neon cyan,     neon fuchsia



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