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SI unit
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sibling species
sib·ling spe·cies (plural sib·ling spe·cies)


noun 
Definition:
 
similar species not capable of interbreeding: a species that closely resembles another in appearance and other characteristics but cannot interbreed with it
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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