Source : Webster's Revised Unabridged Dictionary (1913)

Wake-robin \Wake"-rob`in\, n. (Bot.)
   Any plant of the genus {Arum}, especially, in England, the
   cuckoopint ({Arum maculatum}).

   Note: In America the name is given to several species of
         Trillium, and sometimes to the Jack-in-the-pulpit.

Source : WordNet®

wake-robin
     n 1: any liliaceous plant of the genus Trillium having a whorl of
          three leaves at the top of the stem with a single
          three-petaled flower [syn: {trillium}, {wood lily}]
     2: common American spring-flowering woodland herb having
        sheathing leaves and an upright club-shaped spadix with
        overarching green and purple spathe producing scarlet
        berries [syn: {jack-in-the-pulpit}, {Indian turnip}, {Arisaema
        triphyllum}, {Arisaema atrorubens}]