pro·pane 
(prōpān′)
(prōpān′)n.
A colorless gas, C3H8, found in natural gas and petroleum and widely used as a fuel.
- photophore
- photophosphorylation
- photopia
- photopic
- photoplay
- photopositive
- photoproduct
- photoreaction
- photorealism
- photorealist
- photorealistic
- photoreception
- photoreceptive
- photoreceptor
- photoreconnaissance
- photorefractive
- photoresistor
- photorespiration
- photosensitive
- photosensitivity
- photosensitization
- photosensitize
- photosensitizer
- photoset
- photosetter