Complex numbers and Imaginary number

Imaginary number and complex numbers are semantically related. In some cases you can use "Imaginary number" instead a noun phrase "Complex numbers".

Imaginary number noun - (mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1.

Complex numbers and imaginary number are semantically related. Sometimes you can replace phrase "Complex numbers" with "Imaginary number", this phrases are similar.