Affusion is a method of baptism where water is poured on the head of the person being baptized. The word "affusion" comes from the Latin affusio, meaning "to pour on". Affusion is one of four methods
Affusion of the infant
Immersion baptism is a method of baptism that is distinguished from baptism by affusion and by aspersion, sometimes without specifying whether the immersion is total or partial, but very commonly with
Affusion
…comes from the Latin affusio, meaning "to pour on". Affusion is one of four methods of baptism used by Christians, which also include total or partial immersion baptism and aspersion or sprinkling. Christian denominations which baptize by affusion do not deny the legitimacy of baptizing by submersion or immersion…
The ordinance of baptism by trine immersion is celebrated by the Salem Congregation of the Old German Baptist Brethren Church, New Conference, a Schwarzenau Brethren denomination of the Anabaptist Christian tradition.
A full-immersion baptism in a New Bern, North Carolina river at the turn of the 20th century
Catacombs of San Callisto: Baptism in a 3rd-century painting
Baptism in early Christian art