n :  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  .
 
 
 
Similar sounding terms:  car·o·tene  cor·tin  cre·atine  cre·tin 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.