We found 31 dictionaries that define the word placebo effect:

General (17 matching dictionaries)

1. placebo effect: Longman Dictionary of Contemporary English
2. placebo effect: Merriam-Webster
3. placebo effect: Oxford Learner's Dictionaries
4. placebo effect: American Heritage Dictionary of the English Language
5. placebo effect: Collins English Dictionary
6. placebo effect: Vocabulary.com
7. placebo effect: Wordnik
8. placebo effect: Wiktionary
9. placebo effect: Infoplease Dictionary
10. placebo effect: Dictionary.com
11. Placebo Effect (band), Placebo Effect (film), Placebo Effect (novel), Placebo Effect, Placebo effect (disambiguation), Placebo effect: Wikipedia, the Free Encyclopedia
12. placebo effect: Rhymezone
13. placebo effect: FreeDictionary.org
14. placebo effect: Mnemonic Dictionary
15. placebo effect: TheFreeDictionary.com

Business (1 matching dictionary)

16. Placebo Effect: Management Dictionary

Computing (1 matching dictionary)

17. placebo effect: Encyclopedia

Medicine (10 matching dictionaries)

18. placebo effect: Merriam-Webster Medical Dictionary
19. Dorland's Illustrated Medical Dictionary (No longer online)
20. Placebo effect: MedTerms.com Medical Dictionary
21. AIDSinfo Glossary (No longer online)
22. Medical Dictionary (No longer online)
23. placebo effect: Natural Health glossary
24. online medical dictionary (No longer online)
25. Lay Terms for Consent Forms (No longer online)
26. placebo effect: Medical dictionary
27. Placebo effect: Drug Medical Dictionary

Miscellaneous (1 matching dictionary)

28. placebo effect: The Skeptic's Dictionary

Slang (1 matching dictionary)

29. placebo effect: Urban Dictionary

(Note: See placebo_effects as well.)

Definitions from Wiktionary (placebo effect) ▸ noun:  (pharmacology) The tendency of any medication or treatment, even an inert or ineffective one, to exhibit results simply because the recipient believes that it will work. Similar: antiplacebo, placebo, placebo button, nocebo effect, nocebo, pseudopharmaceutical, nonplacebo, bread pill, desired effect, psychostimulation, more... Opposite: nocebo effect, negative effect, adverse effect Types: nocebo, more... Adjectives: palliative, dx, specific, prescription, curative, special, polydrug, med, catholic, magistral, off label ▸ Words similar to placebo effect ▸ Usage examples for placebo effect ▸ Idioms related to placebo effect ▸ Wikipedia articles (New!) ▸ Words that often appear near placebo effect ▸ Rhymes of placebo effect ▸ Invented words related to placebo effect