piphilology UK /paɪfɪˈlɒləd͡ʒɪ/US /ˌpaɪfɪˈlɑləd͡ʒi/ noun1 •The memorization of the digits of pi as a hobby.In piphilology, ten thousand is the current world record for the number of digits of pi memorized by a human being. — 2019
