the coefficient b in the complex number a + bi.
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Question 1 of 7
Compare real part.
Origin of imaginary part
First recorded in 1925–30
Words nearby imaginary part
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for imaginary part
the coefficient b in a complex number a + 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