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POWER, in arithmetic and algebra; that which arises by the successive multiplication of any number or quantity into itself, the degree of the power being always denominated by the number of equal factors that are employed : thus,2 ==...... 21, 1st power of 2.2 X 2 = ... 22, 2d power, or square. 2 X 2 X 2 = 2s, 3d power, or cube. Hence it appears, that the index which denotes the degree of any power, is always equal to the number of factors from which that power arises ; or one more I ban the number of operations. (See Exponent, and Involution.)