The Collaborative International Dictionary of English v.0.48:

maraschino cherry \ma`ra*schi"no cher"ry\, n.
   1. A cherry which is colored a deep red and sweetened by
      cooking in colored syrup, and flavored with maraschino. It
      is used as a garnish in deserts and cocktails.
      [PJC]

   2. The marasca cherry tree.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

maraschino cherry
    n 1: Dalmatian bitter wild cherry tree bearing fruit whose juice
         is made into maraschino liqueur [syn: marasca, marasca
         cherry, maraschino cherry, Prunus cerasus marasca]
    2: cherry preserved in true or imitation maraschino liqueur
       [syn: maraschino, maraschino cherry]