affusion
nounEtymology From Latin affusio, from Latin affundō (“to pour or sprinkle onto”), from Latin fundō (“to pour”), from Proto-Italic *hundō (“to pour out”), from Proto-Indo-European *ǵʰewd- (“to pour”).
1
The pouring of liquid, especially as a hydrotherapy.
2
A method of Christian baptism in which water is poured on the head of the person being baptized.