noun (n)

• a tropical tree or shrub bearing fruit that germinates while still on the tree and having numerous prop roots that eventually form an impenetrable mass and are important in land building(noun.plant)

  Synonym:
  rhizophora mangle
  

  source: wordnet30
• The name of one or two trees of the genus Rhizophora (R. Mangle, and R. mucronata, the last doubtfully distinct) inhabiting muddy shores of tropical regions, where they spread by emitting aërial roots, which fasten in the saline mire and eventually become new stems. The seeds also send down a strong root while yet attached to the parent plant.(noun)

  source: webster1913