Definition of gamma in English:



  • 1The third letter of the Greek alphabet (Γ, γ), transliterated as ‘g’.

    The combinations γγ, γκ, and γχ are usually transliterated as ‘ng’, ‘nk’, and ‘nkh’ or ‘nch’

    • ‘His professional affiliations include Alpha Zeta, Gamma Sigma Delta, Phi Delta Kappa, and Phi Kappa Phi.’
    • ‘She works with the homeless through her participation in Delta Kappa Gamma and is involved with the Make a Wish Foundation.’
    • ‘Throughout her career, she held various offices in Delta Kappa Gamma.’
    • ‘After following her instructions, we arrived at the Gamma Phi Beta house right on time.’
    • ‘Alas I just found out that she was a member of Delta Gamma at Cornell.’
    • ‘Delta Gamma followed in 1994, and Kappa Kappa Gamma opened its chapter in 2003.’
    • ‘In the Greek alphabet, each letter has a name that is not directly related to its sound value (alpha, beta, gamma, etc.), but this practice is not common in Roman derived alphabets.’
    • ‘She and 28 other pledges were offered membership in Gamma Phi Beta sorority.’
    1. 1.1as modifier Denoting the third in a series of items, categories, etc.
      ‘the alpha, beta, gamma system of share classification’
      • ‘A radioactive material gives off alpha, beta, and gamma emissions.’
      • ‘Among these, alpha, beta, gamma, epsilon and zeta units as well as the isoform of epsilon subunit were shown in 2 - DE gels of tumor cell lines.’
      • ‘This is measured either by directly counting the alpha, beta and gamma radiations from the sample, or by making chemical measurements of the concentration of uranium, thorium and potassium and calculating the dose rate.’
      • ‘It reminds me of Aldous Huxley's Brave New World, where there were different classes of people - the alphas, betas and gammas.’
      • ‘The CSA orientation is described by two Euler angles alpha and Beta, whereas the third angle gamma is evenly distributed about the sample normal.’
      • ‘Bicke's descent into madness begins when he is employed as a salesman in the office furniture business run by Jack Jones, a male so alpha that he is practically beta and gamma as well.’
      • ‘Golembiewski, Billingsly & Jaeger proposed three types of change - alpha, beta and gamma.’
      • ‘Four changes occur in iron, which give rise to forms known as alpha, beta, gamma and delta.’
      • ‘If one demarcates alpha, beta, and gamma world cities as three meaningful tiers, the alpha tier includes the usual urban triumvirate (London, New York, and Tokyo) but also Paris.’
      • ‘All of this suggests that it would be more helpful to redirect theoretical attention to the interplay between alpha (= ‘evenness’), beta, and gamma diversity.’
      • ‘C-reactive protein is located in the area between the beta and gamma components.’
      • ‘There was, however, a rumor that later, when the alpha, beta, gamma theory went temporarily on the rocks, he seriously considered changing his name to Zacharias.’
      • ‘An analysis of possible alpha, beta and gamma carbonic anhydrases in the cyanobacterial genomes shows that there is a wide diversity in carbonic anhydrase gene content.’
      • ‘Inherited dysfibrinogenemia is caused by mutations in the coding region of the fibrinogen A, B, or gamma gene.’
      • ‘It has four allotropic forms or ferrites, known as alpha, beta, gamma, and omega, with transition points at 700, 928, and 1530C.’
      • ‘Even a seemingly tiny piece of radioisotope like plutonium can be emitting many millions of alpha, beta or gamma particles per week.’
      • ‘The interplay of three crystal structures - dubbed the alpha, epsilon and gamma phases - and their electronic and magnetic properties can be represented on a pressure-temperature phase diagram.’
      • ‘For example, the babies are taught to be satisfied with their own caste of which there are five: alphas at the top, then betas, gammas, deltas, and epsilons at the bottom.’
      • ‘It is the quick, hourlong sequence of alpha, beta and gamma emissions that can lead to the mutations in the lung tissue, which can cause cancer.’
      • ‘The G protein consists of alpha, beta, and gamma subunits.’
    2. 1.2British A third-class mark given for an essay or other piece of work.
      • ‘I was very close to a First, but got a gamma double-minus in "Political Institutions".’
    3. 1.3Astronomy followed by Latin genitive The third (usually third-brightest) star in a constellation.
      ‘Gamma Orionis’
      • ‘In 1725 Bradley systematically observed the star Gamma Draconis and noticed a seasonal shift in the star's position on the sky.’
      • ‘His first observation was made on 3rd December 1725, and he saw the star - Gamma Draconis - in his telescope as he expected.’
      • ‘It is also known as the Amazon Star, the warrioress, or Gamma Orionis.’
  • 2as modifier Relating to gamma rays.

    ‘gamma detector’
    • ‘Three complementary instruments make up GRS: the gamma subsystem, the high-energy neutron detector, and the neutron spectrometer.’
    • ‘During gamma irradiation, breakdown of cornstarch particles does not occur, leaving the cornstarch particles cross-linked and more difficult for the body to absorb through biological degradation.’
    • ‘The first magnetar candidates were a family of rare and peculiar galactic sources of gamma and X-rays called soft gamma repeaters (SGRs).’
    • ‘The nuclear portal monitor and Palm Pilot neutron and gamma detector are designed to detect and identify the illicit movement of nuclear materials.’
    • ‘If the energy from the gamma sources is concentrated in collimated beams (presumably two opposite beams), how is it that they happen to be aimed at our Solar System, or do we infer that the number of sources is colossal?’
    • ‘During steam sterilization, cornstarch is broken down, which eases ingestion by the body, an effect that does not occur with gamma irradiation.’
    • ‘By measuring the relative velocity of backscattered gamma particles, they reveal the chemical environment of Fe nuclei in the rock.’
    • ‘Currently, the two most common methods of sterilization are ethylene oxide treatment and gamma irradiation.’
    • ‘In the meantime, the circulating nurse sets up and checks the calibration of the fully charged gamma detector, probe, and cable before bringing the patient into the OR.’
    • ‘Total gamma-ray relates to the natural gamma radioactivity of a sample as determined by the concentration of radioactive isotopes of uranium, thorium and potassium.’
    • ‘Tubing wall thickness can be determined by gamma backscatter probes.’
    • ‘In the treatment of acoustic neuromas, treatments with a gamma knife and linear accelerator produce similar impressive tumour destruction rates, but improved hearing has only been reported after fractionated treatment.’
    • ‘This makes it possible to reach and treat tumors that previously could be treated only with conventional photon and gamma brachytherapy or with external beam treatments.’
    • ‘It measures total neutron and gamma doses from 0 to 1,000 cGy, and it responds to and measures prompt radiation from nuclear bursts.’
    • ‘In addition, current literature on known methods of sterilization, such as gamma irradiation, demonstrates efficacious employment, demanding that standard protocols be implemented for all tissue banks.’
    • ‘The most widely used treatment to induce deletions is gamma irradiation.’
    • ‘The launcher produces excess radiation that is dumped onto the gamma particles, and creates a large shockwave upon impact.’
    • ‘Triplicate samples were thoroughly washed and counted, with the cell-bound radioactivity measured on a gamma counter.’
    • ‘When the patient has been draped, the scrub person covers the gamma detector probe and cable using an appropriate sterile drape (eg, video camera drape) and clamps it securely to the field using nonperforming clamps.’
    • ‘Cesium 137, a radioactive cesium isotope with a mass number of 137 and a half-life of 33 years, is used for gamma irradiation of certain foods and for radiation therapy.’
  • 3Physics
    A unit of magnetic field strength equal to 10⁻⁵ oersted.

    • ‘It might also find that, within the experiment's limits of precision, gamma is equal to one - just as Einstein predicted.’
    • ‘The new finding agrees with Einstein's predicted value for gamma to an accuracy of 23 parts per million.’
    • ‘Mass m in the equation E = mc is equal to the rest mass times the factor gamma.’
    • ‘At very small velocities, gamma is approximately equal to one.’
    • ‘According to Baker, one of the strengths of gamma is that it allows us to assess both the strength and the direction of the association between the two variables in the table.’


Via Latin from Greek.