induration
/ɪndjʊˈɹeɪʃən/noun
University
1
Hardness.
2
An enduring presence; fixity.
3
The process of becoming hard.
4
A hardening of an area of the body as a reaction to inflammation, hyperemia, or neoplastic infiltration.
5
An area or part of the body that has undergone such a reaction.
6
The quality of nonfriability; the extent to which a rock does not crumble; rock strength.
7
The process of the strengthening of rocks by heating, compaction or cementation, or a combination thereof.