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Freshman 15. The term " Freshman 15 " is an expression commonly used in the United States and Canada to refer to weight gain during a student's first year in college. Although the 15 refers to a 15 lb (6.8 kg) weight gain, the expression can apply more generally. In Australia and New Zealand, it is sometimes referred to as " First Year Fatties ...
Middle gray. 50% CIELAB lightness. ( Y = 18.4%) In photography, painting, and other visual arts, middle gray or middle grey is a tone that is perceptually about halfway between black and white on a lightness scale; [1] in photography and printing, it is typically defined as 18% reflectance in visible light. [2] [3]