Alpha (disambiguation)

English Wiktionary
English Wiktionary
The English Wiktionary has dictionary definitions (meanings of a word) for: alfa and alpha

Alpha may mean:

The Greek letter alpha

Alpha, a letter in the Greek alphabet. α may be used as the symbol for:

  • Angle of attack in aerodynamics
  • Common-base current gain of a transistor in electronics
  • In physics:
    • Fine-structure constant, a fundamental physical constant
    • Alpha particle, form of particle radiation
    • H-alpha, or H-α, an emission line created by hydrogen atoms
  • The alpha carbon in organic chemistry
  • In Bayer designation, the typically brightest star in a constellation
  • The significance level in statistical hypothesis testing
  • Alpha channel, describing transparency and opacity in computer graphics
  • The alpha coefficient in evaluating financial returns
  • Thermal diffusivity

Place names

  • Alpha, Michigan
  • Alpha, Minnesota
  • Alpha, New Jersey
  • Alpha, Queensland

Media, literature and fiction

  • Alpha (band), a British electronic music group
  • Alpha Magazine, Australian men's sport magazine
  • Alpha (search engine), a search engine by Yahoo!
  • Alpha TV, a Greek terrestrial channel
  • Alpha the Ultimate Mutant, a character featured in Marvel Comics

Science and mathematics

  • The Bayer designation of the brightest star in a constellation, for example
    • Alpha Centauri, the brightest star system in the southern constellation of Centaurus
  • Alpha (biology), "alpha male" and "alpha female", the highest ranking individuals in a community of social animals
  • Alpha (investment), a measurement of risk-adjusted performance
  • Alpha waves, recorded by electroencephalography
  • Cronbach's alpha, a statistical measure of reliability
  • ALPHA, the Antihydrogen Laser PHysics Apparatus, an experiment at CERN.

Computing

  • Alpha (machine learning), the degree to which a learning agent takes into account new information
  • ALPHA refers to the set of ASCII characters A-Z and a-z, as defined in RFC 4234
  • The ALPHA programming language
  • Alpha, a development stage of software release
  • DEC Alpha, a microprocessor/central processing unit (CPU)
  • AlphaServer - DEC now HP machine successor to the VAX
  • AlphaStation - DEC now HP workstation successor to the VAX

Other

  • Latin alpha, an open back unrounded vowel
  • Space Station Alpha, the original name and unofficial call sign for the International Space Station
  • The first letter in the NATO phonetic alphabet
  • Alpha (radio navigation), a Russian radio navigation system similar to the former Omega Navigation System
  • Alpha 2000, a light aircraft built in New Zealand
  • Alpha Group, a dedicated counter-terrorism unit that belonged to OSNAZ
  • Alpha class submarine, a Russian fast attack nuclear submarine
  • Sony α or Sony Alpha, a digital SLR series by Sony
    • Minolta α or Minolta Alpha, the Japanese name for a series of SLR cameras known as Maxxum or Dynax elsewhere, and predecessor to Sony's brand of the same name
  • Tropical Storm Alpha (2005)
  • Alpha Industries, clothing company