We found 12 dictionaries that define the word hydronium ion:

General (7 matching dictionaries)

1. hydronium ion: Oxford Learner's Dictionaries
2. hydronium ion: Collins English Dictionary
3. hydronium ion: Infoplease Dictionary
4. hydronium ion: Dictionary.com
5. Hydronium ion: Wikipedia, the Free Encyclopedia
6. hydronium ion: TheFreeDictionary.com
7. hydronium ion: Wiktionary

Computing (1 matching dictionary)

8. hydronium ion: Encyclopedia

Medicine (2 matching dictionaries)

9. online medical dictionary (No longer online)
10. Hydronium ion: Medical dictionary

Science (1 matching dictionary)

11. General Chemistry Online (No longer online)

Tech (1 matching dictionary)

12. PUMP AND SEAL TERMS (No longer online)

Definitions from Wiktionary (hydronium ion) ▸ noun:  (chemistry) A positively charged ion that is formed when a hydrogen ion joins with a water molecule. ▸ Words similar to hydronium ion ▸ Usage examples for hydronium ion ▸ Idioms related to hydronium ion ▸ Wikipedia articles (New!) ▸ Words that often appear near hydronium ion ▸ Rhymes of hydronium ion ▸ Invented words related to hydronium ion