Home › Words › P › piphilologypiphilology/paɪfɪˈlɒləd͡ʒɪ/piphilology means the memorization of the digits of pi as a hobby.piphilology is pronounced /paɪfɪˈlɒləd͡ʒɪ/.EtymologyFrom pi + philology.nounThe memorization of the digits of pi as a hobby.e.g.“In piphilology, ten thousand is the current world record for the number of digits of pi memorized by a human being.” — 2019, LL Grace, The Second Day: Sequel to Tomorrow is a new day:Definitions & examples from Wiktionary (CC BY-SA 3.0).