The Collaborative International Dictionary
Sandalwood \San"dal*wood\, n. [F. sandal, santal, fr. Ar. [,c]andal, or Gr. sa`ntalon; both ultimately fr. Skr. candana. Cf. Sanders.] (Bot.)
The highly perfumed yellowish heartwood of an East Indian and Polynesian tree ( Santalum album), and of several other trees of the same genus, as the Hawaiian Santalum Freycinetianum and S. pyrularium, the Australian S. latifolium, etc. The name is extended to several other kinds of fragrant wood.
Any tree of the genus Santalum, or a tree which yields sandalwood.
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The red wood of a kind of buckthorn, used in Russia for dyeing leather ( Rhamnus Dahuricus).
False sandalwood, the fragrant wood of several trees not of the genus Santalum, as Ximenia Americana, Myoporum tenuifolium of Tahiti.
Red sandalwood, a heavy, dark red dyewood, being the heartwood of two leguminous trees of India ( Pterocarpus santalinus, and Adenanthera pavonina); -- called also red sanderswood, sanders or saunders, and rubywood.
Redwood \Red"wood`\ (-w[oo^]d`), n. (Bot.)
A gigantic coniferous tree ( Sequoia sempervirens) of California, and its light and durable reddish timber. See Sequoia.
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An East Indian dyewood, obtained from Pterocarpus santalinus, C[ae]salpinia Sappan, and several other trees.
Note: The redwood of Andaman is Pterocarpus dalbergioides; that of some parts of tropical America, several species of Erythoxylum; that of Brazil, the species of Humirium.
Wikipedia
Pterocarpus santalinus, with the common names red sanders, red sandalwood, and saunderswood, is a species of Pterocarpus endemic to the southern Eastern Ghats mountain range of South India. This tree is valued for the rich red color of its wood. The wood is not aromatic. The tree is not to be confused with the aromatic Santalum sandalwood trees that grow natively in South India.