from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The third letter of the Greek alphabet. See Table at alphabet.
  • n. The third item in a series or system of classification.
  • n. A unit of magnetic intensity equal to one hundred thousandth (10-5) of an oersted.
  • n. A unit of mass equal to one millionth (10-6) of a gram.
  • n. Chemistry The third position from a designated carbon atom in an organic molecule at which an atom or a radical may be substituted.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The name of the third letter of the Greek alphabet (Γ, γ), preceded by beta (Β, β) and followed by delta, (Δ, δ).
  • n. The Gamma function, symbolized by Γ.
  • n. A constant approximately equal to 0.55721566, symbolized by γ.
  • n. A unit of magnetic field equal to 1 nT.

from the GNU version of the Collaborative International Dictionary of English

  • n. The third letter (Γ, γ = Eng. G) of the Greek alphabet.

from The Century Dictionary and Cyclopedia

  • n. The third letter of the Greek alphabet, Γ, γ, represented historically by c, phonetically by g, in the Roman and English alphabet.
  • n. In entomology, a common European noctuid moth of the family Plusiidæ, Plusia gamma. Also called silver-Y and gamma-moth, from the shape of a silvery spot on the wing, like that of Greek gamma, γ, or English Y. The larva feeds on various low plants.
  • n. Same as gamut.
  • n. A proposed unit of magnetic intensity, equal to one hundred thousandth of a gilbert per second.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. Portuguese navigator who led an expedition around the Cape of Good Hope in 1497; he sighted and named Natal on Christmas Day before crossing the Indian Ocean (1469-1524)
  • n. the 3rd letter of the Greek alphabet
  • n. a unit of magnetic field strength equal to one-hundred-thousandth of an oersted


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English, from Greek, of Phoenician origin; see gml2 in Semitic roots.


  • Litt et al and other proponents of neurocomputation should attempt to show how global brain gamma synchrony can be explained by classical (non-quantum) neural mechanisms.

    A Third Choice (ID Hypothesis)

  • George Clark carried out one of the first surveys in gamma rays.

    Riccardo Giacconi - Autobiography

  • They said the drug changes the way an enzyme called gamma secretase works, without completely blocking it, an approach that so far has failed in human trials.

    Yahoo! News: Business - Opinion

  • The effects are characterized by a variable known as gamma, which is explored in this interactive tutorial. of a digital image refers to the degree of clarity in both coarse and fine specimen detail.


  • C-gamma translates into mRNA in vivo (as is the case with a handful of other retroposon's), and since it has an intact reading frame this mRNA can be translated into protein in vitro and in cell lysates. News

  • l Oct. 10 - Derek Fox and Christopher Palma, both of Penn State, explain gamma ray bursts in the early universe, the Swift gamma ray telescope mission and the importance of teaching high school students about these cosmic phenomenon.

    Skywatch: Dazzling Jupiter will rule the night in October

  • Lilly's semagacestat aimed to slow or reverse the progression of Alzheimer's disease by inhibiting an enzyme called gamma secretase, which is important in building a sticky substance called amyloid that can clump in the brain.

    Failed Lilly Drug Prompts Concern

  • This enzyme controls the production of a crucial brain chemical called gamma-aminobutyric acid (GABA) necessary for brain cells to communicate properly without getting overly stimulated.

    Medical Mystery: A Girl Loses Her Mind

  • The drug scrapped by Lilly, semagacestat, is known as a gamma secretase inhibitor, which was designed to work by blocking an enzyme in the brain that causes the formation of a substance called amyloid.

    Lilly Halts Development

  • The space agency's orbiting Swift observatory was overwhelmed by glare from the eruption, called a gamma-ray burst.

    NASA Satellite Blinded By 'Biggest Ever' Star Explosion


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  • Gamma is the 3rd letter of the Greek alphabet. Derived from the Phonecian 'Gimel' (meaning 'camel'). Gamma is equvilent to C or G in the modern alphabet (I think :D) and can be combined with other letters to make different sounds. Used in nuclear physics for gamma radiation.

    June 23, 2008