Princeton's WordNet

1. kaffir boom, Transvaal kafferboom, Erythrina lysistemon(noun)

   small semi-evergreen tree of South Africa having dense clusters of clear scarlet flowers and red seeds

2. kaffir boom, Cape kafferboom, Erythrina caffra(noun)

   small semi-evergreen broad-spreading tree of eastern South Africa with orange-scarlet flowers and small coral-red seeds; yields a light soft wood used for fence posts or shingles