tyrosine
noun
- a phenolic amino acid C₉H₁₁NO₃ that is a precursor of several important substances (such as epinephrine and melanin)
Wiktionary
noun
Etymology: From Ancient Greek τῡρός (tūrós, “cheese”) + -ine (since first discovered in cheese); surface analysis is approximately tyro- + -ine.
- A nonessential amino acid 2-amino-3-(4-hydroxyphenyl)propanoic acid found in most animal proteins, especially casein