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GAMMAS

[gam-uh]

noun

the third letter of the greek alphabet (Γ, γ).

the consonant sound represented by this letter.

the third in a series of items.

(initial capital letter) Astronomy. 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.

EXPAND

Physics. a unit of magnetic field strength, equal to 10−⁵ gauss.

Photography. a measure of the degree of development of a negative or print.

Television. an analogous numerical indication of the degree of contrast between light and dark in the reproduction of an image in television.

Chiefly British. a grade showing that an individual student is in the third, or lowest, of three scholastic sections in a class. Compare alpha (def. 7), beta (def. 8).

COLLAPSE

Origin:
< Greek gámma

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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