ˌind(y)əˈrāshən noun
( -s )
Etymology: Middle English induracion, from Middle French or Late Latin; Middle French induration, from Late Latin induration-, induratio, from induratus + -ion-, -io -ion
1. : the act or process of growing hard or the state of having grown hard: as
a. : hardness or inflexibility of character, manner, or feeling : obstinacy , obdurateness , callousness
b. : the act of becoming inured (as to drudgery)
induration to hackwork — Saturday Review
c. : the process by which a rock or rock material is indurated
d. : an increase in the fibrous elements in tissue commonly associated with inflammation and marked by loss of elasticity and pliability : sclerosis
2. : a hardened mass or formation