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photogram
photogrammetry
photograph
photographic
photographic magnitude
photographic memory
photography
photogravure
photoheterotrophic
photoinduced
photointerpretation
photoionization
photojournalism
photokinesis
photolithography
photoluminescence
photolysis
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photofission
pho·to·fis·sion [ ftō físh'n ] (plural pho·to·fis·sions)


noun 
Definition:
 
gamma radiation induced fission: nuclear fission induced by gamma rays
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