rain tree

from WordNet (r) 3.0 (2006)

rain tree
    n 1: large ornamental tropical American tree with bipinnate
         leaves and globose clusters of flowers with crimson stamens
         and seed pods that are eaten by cattle [syn: {rain tree},
         {saman}, {monkeypod}, {monkey pod}, {zaman}, {zamang},
         {Albizia saman}]

from The Collaborative International Dictionary of English v.0.48

Zamang \Za*mang"\, n. (Bot.)
   An immense leguminous tree ({Pithecolobium Saman}) of
   Venezuela. Its branches form a hemispherical mass, often one
   hundred and eighty feet across. The sweet pulpy pods are used
   commonly for feeding cattle. Also called {rain tree}. --J.
   Smith (Dict. Econ. Plants).
   [1913 Webster]