ab initio (disambiguation)

Look up ab initio in Wiktionary, the free dictionary.

ab initio is a Latin term used in English, meaning from the beginning.

ab initio may also refer to:

• Ab Initio (company), an ETL Tool Software Company in the field of Data Warehousing.
• ab initio quantum chemistry methods
• Marriages annulled under the Catholic Church are considered as annulled ab initio, meaning that the marriage was invalid from the beginning