The Collaborative International Dictionary of English v.0.48:

Loment \Lo"ment\, n. [L. lomentum a mixture of bean meal and
   rice, used as a cosmetic wash, bean meal, fr. lavare, lotum,
   to wash.] (Bot.)
   An elongated pod, consisting, like the legume, of two valves,
   but divided transversely into small cells, each containing a
   single seed.
   [1913 Webster]

WordNet (r) 3.0 (2006):

loment
    n 1: seedpods that are constricted between the seeds and that
         break apart when mature into single-seeded segments