ˌinztə̇ˈlāshən, ˌin(t)stə̇- noun
( -s )
Etymology: Middle French & Latin; Middle French, from Latin instillation-, instillatio, from instillatus (past participle) + -ion-, -io -ion
1. : an act of instilling : introduction by instilling
repeated instillation of penicillin
2. : something that is instilled or designed for instillation
an oily instillation
silver instillation for use in the eyes of the newborn