imaginary number


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

Origin of imaginary number

1
First recorded in 1905–10

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British Dictionary definitions for imaginary number

imaginary number

noun
  1. any complex number of the form i b, where i = √–1

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

Scientific definitions for imaginary number

imaginary number

[ ĭ-măjə-nĕr′ē ]


  1. 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.

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