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pernicious anemia
per·ni·cious a·ne·mi·a


noun 
Definition:
 
form of anemia: a severe form of anemia, found mostly in older adults, that results from the body's inability to absorb vitamin B12. Symptoms include weakness, breathing difficulties, and weight loss.
Encarta® World English Dictionary [North American Edition] © & (P)2007 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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