Definition of "cornified"

The least cornified, young cells stain violet or blue, more mature cells mauve and the most cornified, old and dying cells stain red.

1966, New Scientist, page 290

Epidermis on the palms and soles is thicker and more cornified than epidermis on other areas of the body because of frequent use and superficial trauma.

1998, Charles William Cummings, Charles J. Krause, David E. Schuller, Otolaryngology: Head & Neck Surgery, page 574

The filiform variety are less numerous in cats than in dogs but are more heavily cornified, with backward-pointing hooklike tips.

2002, Douglas H. Slatter, Textbook of Small Animal Surgery, page 499

“Timberlake,” it wrote,” is the most cornified and harmless of pop stars […] ”

2007 December 7, Mal Vincent, “Former boy-band singer takes a risk with 'Alpha Dog’ role”, in Virginian-Pilot‎