Wiktionary
imaginary part
n. (context complex analysis English) Of a complex number ''a + bi'', where ''a'' and ''b'' are real numbers, the value ''b''.
WordNet
imaginary part
n. the part of a complex number that has the square root of -1 as a factor [syn: imaginary part of a complex number]
Usage examples of "imaginary part".
CH, CN and CC functional groups are evident in the imaginary part of the refractive index, as expected from the gas phase products that are the tholin precursors.