Alpha

n. Greek letter; beginning; brightest star in a constellation; (in Computer Graphics) fourth color component (that allows control over blending colors with a background or hidden objects)

Alpha may refer to:The Greek letter alpha Alpha (letter), a letter in the Greek alphabet. α may be used as the symbol for:Angle of attack in aerodynamicsCommon-base current gain of a transistor in electronicsIn physics:Angular accelerationFine-structure constant, a fundamental physical constant Alpha particle, form of particle radiationH-alpha, or H-α, an emission line created by hydrogen atomsThe alpha carbon in organic chemistryIn Bayer designation, the typically brightest star in a constellation The significance level in statistical hypothesis testingAlpha channel, describing transparency and opacity in computer graphicsThe alpha coefficient in evaluating financial returnsThermal diffusivityA symbol to denote Direct proportion, in mathematics
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Noun
1. the 1st letter of the Greek alphabet
(hypernym) letter, letter of the alphabet, alphabetic character
(member-holonym) Greek alphabet
2. the beginning of a series or sequence; "the Alpha and Omega, the first and the last, the beginning and the end"--Revelations
(hypernym) start
Adjective
1. first in order of importance; "the alpha male in the group of chimpanzees"; "the alpha star in a constellation is the brightest or main star"
(similar) important, of import
2. early testing stage of a software or hardware product; "alpha version"
(similar) exploratory, explorative

n. alpha, Greek letter; brightest star of in a constellation

n. alpha, Greek letter; beginning