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noun
An amino acid that is required by animals but that they cannot synthesize; must be supplied in the diet.
is a specific kind of: amino acid, aminoalkanoic acid.
is a broader term that covers: arginine | histidine | isoleucine | leucine | lysine | methionine | phenylalanine | threonine | tryptophan, tryptophane | valine.
Find more on essential amino acid elsewhere: etymology - rhymes - Wikipedia.
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