schizocarp

from WordNet (r) 3.0 (2006)

schizocarp
    n 1: a dry dehiscent fruit that at maturity splits into two or
         more parts each with a single seed

from The Collaborative International Dictionary of English v.0.48

Schizocarp \Schiz"o*carp\, n. [Schizo- + Gr. ? fruit.] (Bot.)
   A dry fruit which splits at maturity into several closed
   one-seeded portions.
   [1913 Webster]