[ gam-uh ]
/ ˈgæm ə /
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Origin of gamma

From the Greek word gámma
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use gamma in a sentence

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 (1 of 2)


The Greek letter gamma. Entries beginning with this character are alphabetized under gamma.

Medical definitions for gamma (2 of 2)

[ 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.