photopolymerization
noun
pho·to·po·ly·mer·iza·tion
variants:
also British photopolymerisation \ ˌfōt-ō-pə-ˌlim-ə-rə-ˈzā-shən, -ˌpäl-ə-mə-rə- 
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Medical Definition of photopolymerization
: polymerization under the influence of radiant energy (as light) : photochemical polymerization