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essential amino acid
es·sen·tial a·mi·no ac·id (plural es·sen·tial a·mi·no ac·ids)


noun 
Definition:
 
amino acid required for growth: any amino acid that the body cannot make and that must be obtained from food to maintain growth
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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