instillation
noun
in·stil·la·tion
| \ ˌin(t)-stə-ˈlā-shən, -(ˌ)stil-ˈā-
\
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Medical Definition of instillation
1
: an act of instilling : introduction by instilling
repeated instillation of penicillin
2
: something that is instilled or designed for instillation
silver instillation for use in the eyes of the newborn