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

[syn: complex number, complex quantity, imaginary number, imaginary]

WordNet (r) 3.0 (2006):

complex quantity n 1: (mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1 [syn: complex number, complex quantity, imaginary number, imaginary]