- A horserace between pacers or trotters harnessed to sulkies.挽车赛马：快跑或小跑的马拖着单人双轮马车的跑马赛
- photobomb
- photocell
- photochemical smog
- photochemistry
- photocinesis
- photocoagulation
- photocompose
- photocomposition
- photoconductivity
- photocopier
- photocopier
- photocopy
- photocurrent
- photodecomposition
- photodegradable
- photodisintegration
- photodrama
- photoduplicate
- photodynamic
- photodynamics
- photoed
- photoelectric
- photoelectric cell
- photoelectric effect
- photoelectron