First Known Use: 1884
Dictionary
cysteine
noun cys·te·ine \ˈsis-tə-ˌēn\
Definition of CYSTEINE
: a crystalline sulfur-containing amino acid C3H7NO2S readily oxidizable to cystine
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Origin of CYSTEINE
International Scientific Vocabulary, from cystine + -ein
Medical Dictionary
cysteine
noun cys·teine \ˈsis-tə-ˌēn\
Medical Definition of CYSTEINE
: a sulfur-containing amino acid C3H7NO2S occurring in many proteins and glutathione and readily oxidizable to cystine—abbreviation Cys
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