Existing only in the imagination. / (mathematics, of a number) Having no real part; that part of a complex number which is a multiple of √ (called imaginary unit).

Imagination; fancy. / (mathematics) An imaginary quantity.

plural of imaginary

the state of being imaginary

(complex analysis) Of a complex number a + bi, where a and b are real numbers, the value b.

(complex analysis, strict sense) A number of the form bi, where b is any real number and i denotes the imaginary unit.

(complex analysis) Of a number, having real part equal to zero.

(mathematics) The vertical line in the complex plane, every point on which corresponds to a complex number having zero real component

plural of imaginary number

plural of imaginary part