Noun
Any of a number of trees with milky sap:
(South Africa) Sideroxylon inermis, the white milkwood
(South Africa) Mimusops zeyheri, the Transvaal red milkwood.
(South Asia, 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.
Source: en.wiktionary.org