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illuvia
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imaginary number
i·mag·i·nar·y num·ber (plural i·mag·i·nar·y num·bers)


noun 
Definition:
 
complex number with imaginary unit: a complex number in the form a + ib where i is the square root of minus one, and b is not equal to zero.
See also  real number
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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