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| i·mag·i·nar·y u·nit (plural i·mag·i·nar·y u·nits) |
noun |
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| Definition: |
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root of -1: the positive square root of minus one
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| 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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