phen·yl·al·a·nine (f n  l- l -n n, fnl-)n. An essential amino acid, C9H11NO2, that occurs as a constituent of many proteins and is normally converted to tyrosine in the human body. It is necessary for growth in infants and for nitrogen equilibrium in adults. |
phenylalanine [ˌfiːnaɪlˈæləˌniːn ˌfɛnɪl-]
n
(Chemistry / Elements & Compounds) an aromatic essential amino acid; a component of proteins
| phenylalanine (fnl-l-nn) An essential amino acid. Chemical formula: C9H11NO2. See more at amino acid. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | phenylalanine - 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 essential amino acid - an amino acid that is required by animals but that they cannot synthesize; must be supplied in the diet |
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