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# imaginary number

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noun Mathematics.

Also called imaginary, pure imaginary number. a complex number having its real part equal to zero.

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## Origin of imaginary number

First recorded in 1905â€“10

## Words nearby imaginary number

image tube, imaginable, imaginal, imaginary, imaginary axis, imaginary number, imaginary part, imaginary runner, imaginary unit, imagination, imaginative

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, Â© Random House, Inc. 2023

## How to use imaginary number in a sentence

A theory obeying the rules of quantum physics needs imaginary numbers to describe the real world, two new experiments suggest.

Quantum physics requires imaginary numbers to explain reality|Emily Conover|December 15, 2021|Science NewsNow from a quadric equation we derive, in like manner, the notion of a complex or imaginary number such as is spoken of above.

## British Dictionary definitions for imaginary number

imaginary number

noun

any complex number of the form i b, where i = âˆšâ€“1

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
Â© William Collins Sons & Co. Ltd. 1979, 1986 Â© HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Scientific definitions for imaginary number

imaginary number

[ Ä-mÄƒjâ€²É™-nÄ•râ€²Ä“ ]

A type of complex number in which the multiple of i (the square root of -1) is not equal to zero. Examples of imaginary numbers include 4i and 2 - 3i, but not 3 + 0i (which is just 3). See more at complex number.

The American HeritageÂ® Science Dictionary
Copyright Â© 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.