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phototropic
phototropism
phototropy
phototube
phototypeset
phototypesetting
photovoltaic
photovoltaic cell
photovoltaic effect
phragmites
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photosphere
pho·to·sphere [ fṓtə sfr ] (plural pho·to·spheres)


noun 
Definition:
 
visible surface layer of Sun: the intensely bright gaseous outer layer of a star, especially the Sun. Sunspots and faculae are features of the photosphere.

pho·to·spher·ic [ ftə sfrik, ftə sférrik ] adjective
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