imaginary number

imaginary number

n.

A complex number in which the imaginary part is not zero.

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imaginary number  (-mj-nr)

A type of complex number in which the multiple of i (the square root of -1) is not equal to zero. Examples of imaginary numbers include 4i and 2 - 3i, but not 3 + 0i (which is just 3). See more at complex number.

Thesaurus

Noun

1.

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 complex number, complex quantity, imaginary math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement number - a concept of quantity involving zero and units; "every number has a unique position in the sequence" complex conjugate - either of two complex numbers whose real parts are identical and whose imaginary parts differ only in sign real, real number - any rational or irrational number pure imaginary number - an imaginary number of the form a+bi where a is 0 imaginary part, imaginary part of a complex number - the part of a complex number that has the square root of -1 as a factor