Ab initio

The Latin term ab initio means from the beginning and is used in several contexts:

Marriages annulled under the Catholic Church are considered as ab initio, meaning that the marriage was invalid from the beginning. See Annullment.
ab initio quantum chemistry methods, chemistry term sometimes abbreviated to ab initio
Ab Initio is an extract, transform, load tool used to manipulate data in computing

Translation

The phrase "Ab initio" occurs as such in the following languages: English, Norwegian (Bokmål).