WordNet (r) 3.0 (2006):

silver dollar
    n 1: a dollar made of silver [syn: silver dollar, cartwheel]
    2: southeastern European plant cultivated for its fragrant
       purplish flowers and round flat papery silver-white seedpods
       that are used for indoor decoration [syn: honesty, silver
       dollar, money plant, satin flower, satinpod, Lunaria
       annua]