[ gam-uh ]
/ ˈgæm ə /


Origin of gamma

From the Greek word gámma Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for gamma

British Dictionary definitions for gamma (1 of 2)

/ (ˈɡæmə) /


the third letter in the Greek alphabet (Γ, γ), a consonant, transliterated as g. When double, it is transcribed and pronounced as ng
the third highest grade or mark, as in an examination
a unit of magnetic field strength equal to 10 –5 oersted. 1 gamma is equivalent to 0.795 775 × 10 –3 ampere per metre
photog television the numerical value of the slope of the characteristic curve of a photographic emulsion or television camera; a measure of the contrast reproduced in a photographic or television image
  1. involving or relating to photons of very high energya gamma detector
  2. relating to one of two or more allotropes or crystal structures of a solidgamma iron
  3. relating to one of two or more isomeric forms of a chemical compound, esp one in which a group is attached to the carbon atom next but one to the atom to which the principal group is attached

Word Origin for gamma

C14: from Greek; related to Hebrew gīmel third letter of the Hebrew alphabet (probably: camel)

British Dictionary definitions for gamma (2 of 2)

/ (ˈɡæmə) /


(foll by the genitive case of a specified constellation) the third brightest star in a constellationGamma Leonis
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for gamma

[ gămə ]



Relating to or being the atom or radical group that is in the third position relative to the functional group of atoms in an organic molecule.
Relating to or characterizing a polypeptide chain that is one of five types of heavy chains that may be present in immunoglobins.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.