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pro·lif·er·a·tion | \ prə-ˌlif-ə-ˈrā-shən 
\
\Medical Definition of proliferation
1a : rapid and repeated production of new parts or of offspring (as in a mass of cells by a rapid succession of cell divisions)
b : a growth so formed
2 : the action, process, or result of increasing by or as if by proliferation
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