Webster's 1913 Dictionary
TYROSIN
Tyr "o *sin, n. Etym: [Gr. (Physiol. Chem. )
Defn: A white crystalline nitrogenous substance present in small amount in the pancreas and spleen, and formed in large quantity from the decomposition of proteid matter by various means, -- as by pancreatic digestion, by putrefaction as of cheese, by the action of boiling acids, etc. Chemically, it consists of oxyphenol and amidopropionic acid, and by decomposition yields oxybenzoic acid, or some other benzol derivative. [Written also tyrosine. ]
New American Oxford Dictionary
tyrosinase
ty ro si nase |tīˈräsəˌnās, -ˌnāz ˈtaɪrəsəneɪs | ▶noun Biochemistry a copper-containing enzyme that catalyzes the formation of quinones from phenols and polyphenols (e.g., melanin from tyrosine ). ORIGIN late 19th cent.: from tyrosine + -ase .
tyrosine
ty ro sine |ˈtīrəˌsēn ˈtaɪrəsin | ▶noun Biochemistry a hydrophilic amino acid that is a constituent of most proteins and is important in the synthesis of some hormones. [Chem. formula: C 6 H 4 (OH )CH 2 CH (NH 2 )COOH. ] ORIGIN mid 19th cent.: formed irregularly from Greek turos ‘cheese ’ + -ine 4 .
Oxford Dictionary
tyrosinase
tyrosinase |ˈtʌɪrəsɪneɪz, tʌɪˈrɒs -| ▶noun [ mass noun ] Biochemistry a copper-containing enzyme which catalyses the formation of quinones from phenols and polyphenols (e.g. melanin from tyrosine ). ORIGIN late 19th cent.: from tyrosine + -ase .
tyrosine
tyrosine |ˈtʌɪrəsiːn | ▶noun [ mass noun ] Biochemistry a hydrophilic amino acid which is a constituent of most proteins and is important in the synthesis of some hormones. ●Chem. formula: C 6 H 4 (OH )CH 2 CH (NH 2 )COOH. ORIGIN mid 19th cent.: formed irregularly from Greek turos ‘cheese ’ + -ine 4 .
Duden Dictionary
Tyrosin
Ty ro sin Substantiv, Neutrum Biochemie , das |Tyros i n |das Tyrosin; Genitiv: des Tyrosins in den meisten Eiweißstoffen enthaltene Aminosäure
The Wordsmith Dictionary