What is AB OVO? Definition of AB OVO in Black's Law Dictionary
The egg, hence from the beginning in allusion to old Roman custom of beginning a meal with eggs and ending with fruit, ab ovo usque ad mala. To begin with eggs and end with fruit. Also, at times in allusion to poets who began history of Trojan war with the egg from which Helen was said to have been hatched in contrast with Homer who plunged into the midst of things, or in media res.