gamma


Also found in: Dictionary, Thesaurus, Financial, Acronyms, Encyclopedia, Wikipedia.

γ

 
gamma, the third letter of the Greek alphabet, often used to indicate the third member of a series, such as the γ chain of hemoglobin. See also terms beginning gamma.

gamma

 [gam´ah]
the third letter of the Greek alphabet, γ, used in names of chemical compounds to distinguish one of three or more isomers or to indicate the position of substituting atoms or groups.
gamma chain disease a type of heavy chain disease that resembles a malignant lymphoma, with symptoms of lymphadenopathy, hepatosplenomegaly, and recurrent infections.
gamma globulin
1. a class of plasma proteins composed almost entirely of immunoglobulins, the proteins that function as antibodies. Production of gamma globulin may be increased in the body when there is invasion by harmful microorganisms. An abnormal amount in the blood, a condition known as hypergammaglobulinemia, may be indicative of a chronic infection or certain malignant blood diseases. There is also a rare condition, agammaglobulinemia, in which the body is unable to produce gamma globulin; patients suffering from this are extremely susceptible to infection and must be given frequent injections of gamma globulin serum.
gamma rays (γ-rays) electromagnetic emissions from radioactive substances; they are similar to and have the same general properties as x-rays but are produced through the disintegration of certain radioactive elements. They consist of high energy photons, have short wavelengths, and have no mass and no electric charge. Gamma rays are sometimes used in the treatment of deep-seated malignancies (see radiation therapy).

γ

1. Third letter in the Greek alphabet, gamma.
2. In chemistry, denotes the third in a series, the fourth carbon in an aliphatic acid, or position 2 removed from the α position in the benzene ring.
3. Symbol for 10-4 gauss; surface tension; activity coefficient; microgram.
4. Symbol for photon. For terms having this prefix, see the specific term.

gam·ma

(gam'ă),
1. Third letter of the Greek alphabet, γ.
2. A unit of magnetic field intensity equal to 10-9 T.
[G.]

gamma

(1) Microgram; 10-6g. 
(2) An obsolete, non-SI (International System) unit of magnetic field strength equal to 0.795/0.775 ampere/m.

gamma

γ Symbol for:
1. Heavy chain of immunoglobulin G–IgG.
2. Hemoglobin monomeric chain.
3. Photon.
4. The 3rd carbon in an aliphatic organic molecule Genetics A value calculated by the ratio between synonymous DNA mutations, which don't result in a different amino acid being translated from a codon, and nonsynonymous mutations–which result in a different amino acid being encoded Imaging A measure of contrast 1. Film–The slope of the density vs. exposure curve 2. Electronic display terminology–The slope of the brightness distribution curve; a large gamma indicates a steep slope and high contrast.

γ

Abbreviation for activity coefficient;
gamma;
photon.

γ

1. Gamma (q.v.).
2. Abbreviation for activity coefficient; surface tension.

gam·ma

(γ) (gam'ă)
1. Third letter in the Greek alphabet.
2. chemistry The third in a series, the fourth carbon in an aliphatic acid, or position 2 removed from the α position in the benzene ring.
3. Symbol for 10-4 gauss.
4. For terms with the prefix γ, see the specific term.
[G.]

gamma

The third letter of the Greek alphabet. Often used in medicine to denote a particular class.

gamma

(y) radiation electromagnetic radiation of shorter wavelength and higher energy than X-RAYS. See ELECTROMAGNETIC SPECTRUM.

γ

Third letter in the Greek alphabet, gamma; photon.
References in periodicals archive ?
Bates, M.D., Chairman and CEO of American Shared, said, "We are pleased to bring the Gamma Knife to Peru.
"We do not wish to alarm you, but we must pass along this information," an attachment to the May issue of the Gamma Mu newsletter warned members.
"If the source is the luminous blue variable star, it is the first time that gamma ray emission has been linked to such a massive star.
Gamma rays, it seems, aren't just for physicists anymore.
Laforgia, Monotonicity results for the gamma function, Atti Accad.
Gamma radiation is often used to kill living organisms, in a process called irradiation.
This article uncovers new research showing the ability of gamma tocopherol to combat conditions as diverse as asthma, cancer, metabolic syndrome, cardiovascular conditions, Alzheimer's, and Parkinson's disease.
To measure the parity-violating gamma ray asymmetry in [[right arrow].n] + p [right arrow] d + [gamma], we need an intense source of polarized neutrons in the meV energy range, a hydrogen target, a high-efficiency, large solid angle [gamma]-ray detector, and a means of reversing the spin of the neutron beam without altering any other experimental conditions.
Diehl and other researchers had previously constructed maps of the galaxy's aluminum-26 by using less-sensitive instruments, such as a detector on the now-defunct Compton Gamma Ray Observatory (SN: 1/25/,92, p.
Summary: TEHRAN (FNA)- If our eyes could see gamma rays, the Moon would appear brighter than the Sun!
Gamma seal lids are closures which are used for plastic pails and buckets.