A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use.
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.
To form such hardened tissue.
The patterns left on surfaces where uncovered fingertips have touched, especially as used to identify the person who touched the surface.
The natural pattern of ridges on the tips of human fingers, unique to each individual.
A unique combination of features that serves as an identification of something.
Unique identification for public key in asymmetric cryptosystem.
A trace that gives evidence of someone's involvement.
To take somebody's fingerprints.
To identify something uniquely by a combination of measurements.