Phi Beta Kappa 
(fī)
(fī)n.
1. An honorary society, founded in 1776, of college students and graduates whose members are chosen on the basis of high academic standing.
2. A member of this society.
[From the initials of the society's motto in Greek philosophiā biou kubernētēs, philosophy the guide of life : philosophiā, philosophy + biou : genitive of bios, life + kubernētēs, guide.]