- the third letter of the Greek alphabet (Γ, γ).
- the consonant sound represented by this letter.
- the third in a series of items.
- a star that is usually the third brightest of a constellation: The third brightest star in the Southern Cross is Gamma Crucis.
- a unit of weight equal to one microgram.
- a unit of magnetic field strength, equal to 10−5 gauss.
- a measure of the degree of development of a negative or print.
- an analogous numerical indication of the degree of contrast between light and dark in the reproduction of an image in television.
- a grade showing that an individual student is in the third, or lowest, of three scholastic sections in a class.
- 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
- 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
- (modifier)
- involving or relating to photons of very high energy
- relating to one of two or more allotropes or crystal structures of a solid
- 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
- the third brightest star in a constellation
