corneous

It had vanished during his babyhood leaving only a corneous spot on his skull; but people were glad when Tomlin died.

From Time Magazine Archive

Ossicula: small corneous pieces that serve in the articulation of the wings to the thorax.

From Explanation of Terms Used in Entomology by John. B. Smith

Base of these wings in the male with a strong bristle passing behind a strong corneous retinaculum, which arises from the anterior side of the sub-costal nervure.

From Discoveries in Australia, Volume 1. With an Account of the Coasts and Rivers Explored and Surveyed During The Voyage of H.M.S. Beagle, in the Years 1837-38-39-40-41-42-43. By Command of the Lords Commissioners of the Admiralty. Also a Narrative Of Captain Owen Stanley's Visits to the Islands in the Arafura Sea. by John Lort Stokes

Episternites: the upper pair of corneous appendages forming the ovipositor in grasshoppers.

From Explanation of Terms Used in Entomology by John. B. Smith

In some, however, the feet end in a single corneous substance called a hoof.

From The Book of Household Management by Mrs. (Isabella Mary) Beeton