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Definition of: gamma
(gam′ə) noun
1. The third letter in the Greek alphabet (Γ, γ): corresponding to g (as in go). As a numeral it denotes 3.
2. Physics A unit of magnetic field intensity, equal to 10-5 gauss.
3. A unit of weight, equal to one thousandth of a milligram.
4. Phot. A number expressing the degree to which a negative has been developed as compared with the range of light values in the subject photographed. [<Gk.]
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