# Definitions and Synonyms of *complex number* | Another word for *complex number* | What is *complex number? *

*Definition 1: (mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1 - [noun denoting quantity]*

*Synonyms for complex number in the sense of this definition*

*(**complex number* is a kind of ...) a concept of quantity involving zero and units

*complex number*is a kind of ...) a concept of quantity involving zero and units

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*"every number has a unique position in the sequence"*