What's the noun for oblation? Here's the word you're looking for.
oblate
(Roman Catholic Church) A person dedicated to a life of religion or monasticism, especially a member of an order without religious vows or a lay member of a religious community.
A child given up by its parents into the keeping or dedication of a religious order or house.
“Titan's oblateness may also help explain why its methane lakes are concentrated near the poles.”
“The degree of this oblateness is small, the researchers report in a paper published online by Science.”
“Newton's derivation of the precession from the gravitational action of the Moon and Sun raised three unresolved questions: What are the correct values for the mass of the Moon and the oblateness of the Earth?”