pho·to·sphere 
(fōtə-sfîr′)
(fōtə-sfîr′)n.
The directly visible outer layer or atmosphere of a star, especially of the sun.
pho′to·spheric (-sfîrĭk, -sfĕrĭk) adj.
- photorefractive
- photoresistor
- photorespiration
- photosensitive
- photosensitivity
- photosensitization
- photosensitize
- photosensitizer
- photoset
- photosetter
- photosphere
- photospheric
- photostat
- photosynthate
- photosynthesis
- photosynthesize
- photosynthetic
- photosynthetically
- phototactic
- phototactically
- phototaxis
- phototherapeutic
- phototherapy
- phototonic
- phototonus