First Known Use: circa 1849
Dictionary
keratin
noun ker·a·tin \ˈker-ə-tən\
Definition of KERATIN
: any of various sulfur-containing fibrous proteins that form the chemical basis of horny epidermal tissues (as hair and nails)
— ke·ra·ti·nous \kə-ˈra-tə-nəs\ adjective
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Origin of KERATIN
International Scientific Vocabulary
Other Biochemistry Terms
Medical Dictionary
keratin
noun ker·a·tin \ˈker-ət-ən\
Medical Definition of KERATIN
: any of various sulfur-containing fibrous proteins that form the chemical basis of horny epidermal tissues (as hair and nails) and are typically not digested by enzymes of the gastrointestinal tract—see pseudokeratin
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