Definition that contains imaginary part
- complex plane a geometric representation of the complex numbers established by the real axis and the orthogonal imaginary axis; it can be thought of as a modified Cartesian plane, with the real part of a complex number represented by a displacement along the x-axis, and the imaginary part by a displacement along the y-axis
- complex conjugate either of two complex numbers whose real parts are identical and whose imaginary parts differ only in sign