prep·py or prep·pie 
(prĕpē) Informal
(prĕpē) Informal n. pl. prep·pies
1. A student or former student of a preparatory school.
2. A person whose manner and dress are deemed typical of traditional preparatory schools.
adj. prep·pi·er, prep·pi·est
Of or relating to a preppy or a preparatory school.
[PREP(ARATORY SCHOOL) + -Y1.]
preppi·ly adv.
preppi·ness n.
- photogrammetric
- photogrammetrist
- photogrammetry
- photograph
- photographable
- photographer
- photographic
- photographical
- photographically
- photography
- photogravure
- photoheliograph
- photojournalism
- photojournalist
- photojournalistic
- photokinesis
- photokinetic
- photolithograph
- photolithographer
- photolithographic
- photolithographically
- photolithography
- photolysis
- photolytic
- photolytically