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(Mathematics) the coefficient b in a complex number a + ib, where i = √–1
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|Noun||1.||imaginary part - the part of a complex number that has the square root of -1 as a factor|
complex number, complex quantity, imaginary, imaginary number - (mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1
pure imaginary number - an imaginary number of the form a+bi where a is 0
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