Dictionary
Thesaurus
Medical
Scrabble®
Spanish Central
Browse DictionaryBrowse Thesaurus
Get our free apps!iPhone•iPad•Android
Games
Word of the Day
Video
Blog: Words at Play
My Faves
Medical Dictionary

1alpha

noun al·pha \ˈal-fə\

Medical Definition of ALPHA

1
:  the 1st letter of the Greek alphabet—symbol Α or α
2
:  alpha particle
3
:  alpha wave

Learn More About

Browse

30 ENTRIES FOUND:
  1. 1) alpha (noun)
  2. 2) alpha (adjective)
  3. a- (prefix)
  4. alpha-1-antitrypsin (noun)
  5. alpha-adrenergic (adjective)
  6. alpha-adrenoceptor (noun)
  7. alpha-amino acid (noun)
  8. alpha-blocker (noun)
  9. alpha cell (noun)
  10. alpha chain disease (noun)
  11. alpha-fetoprotein (noun)
  12. alpha globulin (noun)
  13. alpha-helix (noun)
  14. alpha hemolysis (noun)
  15. alpha hydroxy acid (noun)
  16. alpha-hypophamine (noun)
  17. alpha interferon (noun)
  18. alpha-ketoglutarate (noun)
  19. alpha-ketoglutaric acid (noun)
  20. alpha-lipoprotein (noun)
  21. alpha-naphthol (noun)
  22. alpha-naphthylthiourea (noun)
  23. alpha particle (noun)
  24. alpha radiation (noun)
  25. alpha ray (noun)
  26. alpha-receptor (noun)
  27. alpha rhythm (noun)
  28. alpha-tocopherol (noun)
  29. alpha wave (noun)
  30. interferon alpha (noun)
10 Charming Words for Nasty People
Put-downs with flair
Learn More
When "Literally" isn't, well, literal
How to use a word that (literally) drives some people nuts.
Watch Now
Know what this is?
Test your vocab with our fun, fast game
Go Play
Fear of cats?
Ailurophobia, and 9 other unusual fears
Learn More
Join Us
Merriam-Webster
on Facebook
Merriam-Webster
on Twitter
Bookstore: Digital and Print
Merriam-Webster references for Mobile, Kindle, print, and more.
See All
Other Merriam-Webster Dictionaries