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a food that is inadequate in one or more of the nine amino acids essential for normal growth and maintenance of tissue when used as the sole source of protein and adequate energy is available.
in·com·plete pro·tein(in'kŏm-plēt' prō'tēn)
A protein food that lacks one or more essential amino acids.
A protein lacking one or more of the essential amino acids.See: amino acid, essential
See also: protein