We found 34 dictionaries that define the word heavy water:

General (18 matching dictionaries)

1. heavy water: Merriam-Webster
2. heavy water: Oxford Learner's Dictionaries
3. heavy water: American Heritage Dictionary of the English Language
4. heavy water: Collins English Dictionary
5. heavy water: Vocabulary.com
6. heavy-water: Wordnik
7. heavy-water, heavy water: Wiktionary
8. heavy water: The Wordsmyth English Dictionary-Thesaurus
9. heavy water: Infoplease Dictionary
10. heavy water: Dictionary.com
11. Heavy Water, Heavy-water, Heavy water: Wikipedia, the Free Encyclopedia
12. heavy water: Rhymezone
13. heavy water: Stammtisch Beau Fleuve Acronyms
14. heavy water: FreeDictionary.org
15. heavy water: Mnemonic Dictionary
16. heavy water: TheFreeDictionary.com

Business (1 matching dictionary)

17. Heavy water: Energy Dictionary

Computing (1 matching dictionary)

18. Heavy-water, Heavy water (D2O), heavy water: Encyclopedia

Medicine (3 matching dictionaries)

19. heavy water: Merriam-Webster Medical Dictionary
20. online medical dictionary (No longer online)
21. Heavy-water, Heavy water (D2O), heavy water: Medical dictionary

Science (3 matching dictionaries)

22. Chemistry Dictionary (No longer online)
23. General Chemistry Online (No longer online)
24. Heavy water (D2O): NRC Glossary of Nuclear Terms --

Slang (1 matching dictionary)

25. Heavy Water: Urban Dictionary

Sports (1 matching dictionary)

26. Glossary of Canoe Terminology (No longer online)

Tech (6 matching dictionaries)

27. AUTOMOTIVE TERMS (No longer online)
28. Energy Terms (No longer online)
29. Glossary of Meteorology (No longer online)
30. Lake and Water Word Glossary (No longer online)
31. Nuclear Terms (No longer online)
32. Glossary of Water Resource Terms (No longer online)

(Note: See heavy_waters as well.)

Definitions from Wiktionary (heavy water) ▸ noun:  (inorganic chemistry) Water containing deuterium instead of normal hydrogen (protium); used as a moderator in nuclear reactors. Similar: deuterium oxide, dideuterium, lithium deuteride, dr. wt., dwt., D.WRE, dubnium, HEDP, darmstadtium, hep D, more... Opposite: light water, regular water, ordinary water Types: deuterium oxide, more... Phrases: heavy water reactor, heavy water (d2o), steam generating heavy water reactor, super heavy water, Norwegian heavy water sabotage, more... ▸ Words similar to heavy water ▸ Usage examples for heavy water ▸ Idioms related to heavy water ▸ Wikipedia articles (New!) ▸ Words that often appear near heavy water ▸ Rhymes of heavy water ▸ Invented words related to heavy water