- Family of cystine-rich proteins that tend to aggregate in side-to- side fashion, forming tough filaments or sheets; main constituent of intermediate filaments in epidermal tissues.
Definition from: CRISP Thesaurus via Unified Medical Language System at the National Library of Medicine
- 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.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
Related discussion in the Handbook
See also Understanding Medical Terminology.