We found 16 dictionaries that define the word addition reaction:

General (12 matching dictionaries)

1. addition reaction: Merriam-Webster
2. addition reaction: Oxford Learner's Dictionaries
3. addition reaction: Vocabulary.com
4. addition reaction: Wiktionary
5. addition reaction: Infoplease Dictionary
6. addition reaction: Dictionary.com
7. Addition reaction: Wikipedia, the Free Encyclopedia
8. addition reaction: Rhymezone
9. addition reaction: FreeDictionary.org
10. addition reaction: Mnemonic Dictionary
11. addition reaction: TheFreeDictionary.com
12. addition reaction: Merriam-Webster

Computing (1 matching dictionary)

13. addition reaction: Encyclopedia

Medicine (1 matching dictionary)

14. online medical dictionary (No longer online)

Science (2 matching dictionaries)

15. Chemistry Dictionary (No longer online)
16. addition reaction: PHYSICAL ORGANIC CHEMISTRY

(Note: See addition_reactions as well.)

Definitions from Wiktionary (addition reaction) ▸ noun:  (chemistry) a reaction in which radicals are added to both sides of a double or triple bond Similar: addition, adduct, bisadduct, polyaddition, photoaddition, allylboration, hydroalumination, aminooxygenation, heteroaddition, addend, more... Types: redox, combination, conjugate addition, more... ▸ Words similar to addition reaction ▸ Usage examples for addition reaction ▸ Idioms related to addition reaction ▸ Wikipedia articles (New!) ▸ Words that often appear near addition reaction ▸ Rhymes of addition reaction ▸ Invented words related to addition reaction