Il`li*ni"tion (?), n. [L.
illinire, illinere, to besmear; pref. il- in, on
+ linire, linere, to smear.] 1. A
smearing or rubbing in or on; also, that which is smeared or rubbed
on, as ointment or liniment.
2. A thin crust of some extraneous substance
formed on minerals. [R.]
A thin crust or illinition of black
manganese.
Kirwan.