Webster's English Dictionary

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florescence

flo.res.cence \flo.-'res-*n(t)s, fl*-\ \-*nt\ n [NL florescentia, fr. L 
   florescent-, florescens, prp. of f]lorescere, incho. of flore-re to 
   blossom, flourish - more at FLOURISH : a state or period of flourishing  - 
   flo.res.cent aj