A polypeptide substance comprising about one third of the total protein in mammalian organisms. It is the main constituent of SKIN, CONNECTIVE TISSUE, and the organic substance of bones (BONE AND BONES) and teeth (TOOTH).
A protein substance, probably an anhydride of gelatin, occurring as the chief constituent of the white fibres of connective tissue and the organic part of the bones.
A leading constituent of the bones and flesh.
Syn.: ossein. A substance yielding gelatin on boiling; it forms the organic portion of bones and the hyaline intracellular mass of the connective tissue, etc. [Gr.]