Definition: Meaning of, phenylalanine in English to English dictionary.
Pronunciation:/ ˌfiːnʌɪlˈaləniːn;ˌfɛnɪlˈaləniːn /
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an essential amino acid found in proteins and needed for growth of children and for protein metabolism in children and adults; abundant in milk and eggs; it is normally converted to tyrosine in the human body