Keratin

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

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Ker, Dr. John * Kerguelen's Land
Kensal Green
Kensington
Kent
Kentigern, St.
Kentish Fire
Kentucky
Kepler, John
Kepler's Laws
Keppel, Augustus, Viscount
Ker, Dr. John
Keratin
Kerguelen's Land
Kerman
Kerner, Andreas
Kerosene
Kerry
Kertch
Keswick
Ket, Robert
Kettering
Kew