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image-maker
image map
image tube
imagery
imaginable
imaginary
imaginary number
imaginary part
imaginary unit
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imaginary unit
i·mag·i·nar·y u·nit (plural i·mag·i·nar·y u·nits)


noun 
Definition:
 
root of -1: the positive square root of minus one
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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