Bible Encyclopedias
Keratin

The Nuttall Encyclopedia

A substance forming the chief constituent in the hair, nails, and horn of animals.

Bibliography Information
Wood, James, ed. Entry for 'Keratin'. The Nuttall Encyclopedia. https://www.studylight.org/​encyclopedias/​eng/​nut/​k/keratin.html. Frederick Warne & Co Ltd. London. 1900.