milkwood noun6 •Any of a number of trees with milky sap. •(South-Africa) Sideroxylon inermis, the white milkwood •(South-Africa) Mimusops zeyheri, the Transvaal red milkwood. •(Australia) Alstonia scholaris (scholar tree, milky pine), and other species in the genus Alstonia. •Trimeris scaevolifolia, a tree endemic to the Atlantic island of St. Helena. •Many species of the genus Tabernaemontana, that are native to the Americas. formsmilkwoods