any tropical tree or shrub of the genus Rhizophora, the species of which are mostly low trees growing in marshes or tidal shores, noted for their interlacing above-ground adventitious roots.
2.
any of various similar plants.
Origin: 1605–15; alteration (by folk etymology) of earlier mangrow < Portuguese mangue ≪ Taino
1610s, from Sp. mangle, mangue (1530s), perhaps from Carib or Arawakan. Second syllable is from influence of grove. A Malay origin also has been proposed, but it is difficult to explain how it came to be used for an American plant.