We found 26 dictionaries that define the word reactant:

General (19 matching dictionaries)

1. reactant: Merriam-Webster
2. reactant: Oxford Learner's Dictionaries
3. reactant: American Heritage Dictionary of the English Language
4. reactant: Collins English Dictionary
5. reactant: Vocabulary.com
6. reactant: Wordnik
7. reactant: Cambridge Advanced Learner's Dictionary
8. reactant: Wiktionary
9. reactant: Webster's New World College Dictionary, 4th Ed.
10. reactant: The Wordsmyth English Dictionary-Thesaurus
11. reactant: Infoplease Dictionary
12. reactant: Dictionary.com
13. Reactant: Wikipedia, the Free Encyclopedia
14. reactant: Rhymezone
15. reactant: FreeDictionary.org
16. reactant: Mnemonic Dictionary
17. reactant: TheFreeDictionary.com

Computing (1 matching dictionary)

18. reactant: Encyclopedia

Medicine (4 matching dictionaries)

19. reactant: Merriam-Webster Medical Dictionary
20. Reactant: MedFriendly Glossary
21. online medical dictionary (No longer online)
22. reactant: Medical dictionary

Science (1 matching dictionary)

23. Electrochemistry Dictionary (No longer online)

Slang (1 matching dictionary)

24. reactant: Urban Dictionary

(Note: See reactants as well.)

Definitions from Wiktionary ( ) ▸ noun:  (chemistry) Any of the participants present at the start of a chemical reaction, specifically one that is consumed during the reaction. Similar: precursor, preinitiator, precipitant, precipitate, coprecipitant, beginner, preequilibrium, predeveloper, bioprecursor, prereduction, more... Opposite: product Types: base, acid, catalyst, inhibitor, reductant, oxidant, more... Phrases: limiting reactant, chemical reactant, acute phase reactant, more... Adjectives: acute, other, gaseous, second, solid, single, excess, liquid, initial, organic, key Colors:     blue,     green,     yellow,     red,     orange, more... ▸ Words similar to reactant ▸ Usage examples for reactant ▸ Idioms related to reactant ▸ Wikipedia articles (New!) ▸ Popular adjectives describing reactant ▸ Words that often appear near reactant ▸ Rhymes of reactant ▸ Invented words related to reactant