al·pha \ ˈal-fə \

άλφα, álpha

Α, α


  1. the first letter of the Greek alphabet
  2. the first version of a product that is being developed and tested
  3. the first of a series, the beginning
  4. the brightest start in a constellation
  5. the mathematical estimate of the return on a security when the return on the market as a whole is zero
  6. the return on an investment portfolio that can be attributed to the skill of the portfolio’s manager rather than the performance of the market



  1. having the most power in a group of animals or people
  2. closest in position in the structure of an organic molecule to a particular group or atom; also, occuring at or having a structure characterized by such a position


From the Merriam-Webster and dictionaries.