Definition of milkbush

  1. 1 :  an Australian shrub (Wrightia saligna) of the family Apocynaceae

  2. 2 :  a southern African spurge (Euphorbia tirucalli) that resembles a cactus and has milky juice which is used locally to treat syphilis

  3. 3 West Indies :  a shrub (Rauwolfia tetraphylla) with milky juice

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to cast off or become cast off

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