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Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Tassel \Tas"sel\, v. i. [imp. & p. p. Tasseledor Tasselled;
      p. pr. & vb. n. Tasseling or Tasselling.]
      To put forth a tassel or flower; as, maize tassels.
      [1913 Webster]