We found 16 dictionaries that define the word beta blockers:

General (8 matching dictionaries)

1. beta-blockers: Merriam-Webster
2. beta-blockers, beta-blockers: Collins English Dictionary
3. beta blockers: Vocabulary.com
4. Beta-Blockers, Beta-blockers, beta-blockers: Wordnik
5. beta blockers: Wiktionary
6. beta-blockers: Dictionary.com
7. Beta-blockers, Beta blockers: Wikipedia, the Free Encyclopedia
8. Beta blockers: TheFreeDictionary.com

Computing (1 matching dictionary)

9. Beta-blockers, Beta blockers: Encyclopedia

Medicine (6 matching dictionaries)

10. Blockers, beta: MedTerms.com Medical Dictionary
11. Beta-blockers: Merck Manuals
12. online medical dictionary (No longer online)
13. Beta-blockers, Beta blockers: Medical dictionary
14. Blockers, beta: Drug Medical Dictionary
15. Hyperdictionary (No longer online)

Slang (1 matching dictionary)

16. Beta blockers: Urban Dictionary

(Note: See beta_blocker as well.)

Definitions from Wiktionary (beta blocker) ▸ noun:  (pharmacology) A blocking agent, one of a class of drugs used to treat hypertension and control the rate at which the heart beats. ▸ Also see beta_blocker ▸ Words similar to beta blockers ▸ Usage examples for beta blockers ▸ Idioms related to beta blockers ▸ Wikipedia articles (New!) ▸ Words that often appear near beta blockers ▸ Rhymes of beta blockers ▸ Invented words related to beta blockers