- Photoresistance Noun
- Photoresistivity Noun
- Photoresistor Noun Adj
- Photorespiration Noun Adj
- Photoresponse Noun Adj
- Photoreversal Noun Adj
- Photoroentgenogram Noun Adj
- Photoroentgenograph Noun Verb
- Photoroentgenography Noun
- Photoscanner Noun
- Photoscanning Noun Adj
- Photosedimentometer Noun Adj
- Photosensitiser Noun Adj
- Photosensitising Adj Noun
- Photosensitivity Noun
- Photosensitization Noun Adj
- Photosensitizer Noun Adj
- Photosensitizing Pres. Participle Noun
- Photosensor Noun Adj
- Photosetter Noun Adj
- Photosetting Noun Pres. Participle
- Photoshoot Noun Verb Adj
- Photosphere Noun Adj
- Photostability Noun
- Photostat Noun Verb Adj
- Photostating Noun Pres. Participle
- Photostereograph Noun Verb
- Photosterilization Noun Adj
- Photostimulation Noun Adj
- Photostress Noun Adj
- Photoswitch Noun Adj Verb
- Photosynthate Noun Adj
- Photosynthesis Noun Adj
- Phototachometer Noun Adj
- Phototachymeter Noun Adj
- Phototaxis Noun
- Phototelegram Noun Adj
- Phototelegraph Noun Verb Adj
- Phototelegraphy Noun
- Phototheodolite Noun Adj
- Phototherapy Noun Adj
- Photothermal Adj Noun
- Photothermoelasticity Noun
- Photothermography Noun Adj
- Photothermoplastic Adj Noun
- Photothyristor Noun Adj
- Photothyrystor Noun
- Phototimer Noun Adj
- Phototiming Noun Adj
- Phototopography Noun Adj
- Phototransfer Noun Verb Adj
- Phototransformer Noun Adj
- Phototransistor Noun Adj
- Phototriangulation Noun Adj
- Phototriangulator Noun Adj
- Phototriode Noun Adj
- Phototroph Noun Adj
- Phototropism Noun
- Phototropy Noun
- Phototube Noun Adj