Real Dictionary

sandalwood
uncountable noun: Sandalwood is the oil extracted from the wood of the tree. It is used to make perfume.
uncountable noun: Sandalwood is the sweet-smelling wood of a tree that is found in South Asia and Australia. It is also the name of the tree itself.

Sandalwood in American English
designating a family (Santalaceae, order Santalales) of dicotyledonous plants, shrubs, and trees including the quandong
Sumba
the hard, light-colored, closegrained, sweet-smelling heartwood of any of several allied trees of Asia, used for carving and cabinetmaking or burned as incense; esp., the wood of a S Asian evergreen tree (Santalum album) of the sandalwood family
noun: the fragrant heartwood of any of certain Asian trees of the genus Santalum, used for ornamental carving and burned as incense

sandalwood in British English
noun: any of several evergreen hemiparasitic trees of the genus Santalum, esp S. album ( white sandalwood), of S Asia and Australia, having hard light-coloured heartwood: family Santalaceae