Phenylalanine
//ˌfiːnəlˈæləniːn// noun
noun ·Uncommon ·Advanced level
Definitions
Noun
- 1 An essential amino acid C₉H₁₁NO₂ found in most animal proteins; it is essential for growth; the inability to metabolize it leads to phenylketonuria; it is a constituent of aspartame. countable, uncountable
- 2 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 wordnet
- 3 This molecule or its D-isomer. countable, uncountable
Synonyms
All synonymsExample
More examples"Tyrosine is similar in structure to phenylalanine, with the important distinction that the latter contains a hydroxyl group in its side chain."
Etymology
From phenyl + alanine.
Related phrases
More for "phenylalanine"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.