To form such hardened tissue.
A shining area on the frons of many species of Tabanomorpha (horse flies and relatives).
The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistency, but is ultimately converted into true bone and unites the fragments into a single piece.
The new formation over the end of a cutting, before it puts out rootlets.
A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use.
To become hard (tough, resistant to pressure).
To become or make (a person or thing) resistant or less sensitive.
To become or make (a consonant) more fortis; to (cause to) undergo fortition.
To strengthen.
To make something hard or harder (tough, resistant to pressure).
To modify (a website or other system) to make it resistant to malicious attacks.
To unpalatalize or velarize.