mustard tree Meaning, Definition & Usage

  1. noun evergreen South American shrub naturalized in United States; occasionally responsible for poisoning livestock
    Nicotiana glauca; tree tobacco.
  2. noun glabrous or pubescent evergreen shrub or tree of the genus Salvadora; twigs are fibrous and in some parts of the world are bound together in clusters and used as a toothbrush; shoots are used as camel fodder; plant ash provides salt
    toothbrush tree; Salvadora persica.

WordNet