imaginary number(redirected from Imaginary numbers)
Also found in: Thesaurus, Encyclopedia.
A complex number in which the imaginary part is not zero.
(Mathematics) any complex number of the form ib, where i = √–1
a complex number having its real part equal to zero.
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.
Switch to new 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|
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
pure imaginary number - an imaginary number of the form a+bi where a is 0