We found 31 dictionaries that define the word hydroponics:

General (20 matching dictionaries)

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

Business (1 matching dictionary)

19. Construction Term Glossary (No longer online)

Computing (1 matching dictionary)

20. hydroponics: Encyclopedia

Medicine (3 matching dictionaries)

21. Medical Dictionary (No longer online)
22. online medical dictionary (No longer online)
23. hydroponics: Medical dictionary

Science (3 matching dictionaries)

24. Botanical Terms (No longer online)
25. GreenWeb Gardening Glossary (No longer online)
26. HYDROPONICS: Zoom Astronomy Glossary

Slang (1 matching dictionary)

27. hydroponics: Urban Dictionary

Tech (2 matching dictionaries)

28. Glossary of Agricultural Terms, Programs and Laws (No longer online)
29. Lake and Water Word Glossary (No longer online)

(Note: See hydroponic as well.)

Definitions from Wiktionary ( ) ▸ noun:  The cultivation of plants in a nutrient solution rather than in the soil. Similar: aquiculture, hydroagriculture, hydrosoil, fogponics, hydrosprigging, fertigation, hydropriming, phytodepuration, subirrigation, hydropathy, more... Opposite: soil-based, traditional, conventional Phrases: hydroponics systems, Passive hydroponics, more... Adjectives: commercial, organic, modern, aero, outdoor, practical ▸ Word origin ▸ Words similar to hydroponics ▸ Usage examples for hydroponics ▸ Idioms related to hydroponics ▸ Wikipedia articles (New!) ▸ Popular adjectives describing hydroponics ▸ Words that often appear near hydroponics ▸ Rhymes of hydroponics ▸ Invented words related to hydroponics