- photocoagulation
- photocompose
- photocomposition
- photoconductivity
- photocopier
- photocopier
- photocopy
- photocurrent
- photodecomposition
- photodegradable
- photodisintegration
- photodrama
- photoduplicate
- photodynamic
- photodynamics
- photoed
- photoelectric
- photoelectric cell
- photoelectric effect
- photoelectron
- photoemission
- photoengrave
- photoengraving
- photo-essay
- photo finish