# induration

> English word · Noun · IPA /ɪndjʊˈɹeɪʃən/

## Definitions
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.

## Etymology
From Middle English induracioun, from Old French induracion (“hardness, obstinacy”) or directly from Medieval Latin induratiō.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/induration