moonseed

from WordNet (r) 3.0 (2006)

moonseed
    n 1: plant of the family Menispermaceae having red or black
         fruit with crescent- or ring-shaped seeds

from The Collaborative International Dictionary of English v.0.48

Moonseed \Moon"seed`\, n. (Bot.)
   A climbing plant of the genus {Menispermum}; -- so called
   from the crescentlike form of the seeds.
   [1913 Webster]