From The Collaborative International Dictionary of English v.0.48 [gcide]:
Sandalwood \San"dal*wood\, n. [F. sandal, santal, fr. Ar.
[,c]andal, or Gr. sa`ntalon; both ultimately fr. Skr.
candana. Cf. Sanders.] (Bot.)
(a) 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 Santalum pyrularium, the Australian
Santalum latifolium, etc. The name is extended to
several other kinds of fragrant wood.
(b) Any tree of the genus Santalum, or a tree which yields
sandalwood.
(c) The red wood of a kind of buckthorn, used in Russia for
dyeing leather (Rhamnus Dahuricus).
[1913 Webster]
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.
[1913 Webster] Sandarach
From WordNet (r) 3.0 (2006) [wn]:
red sanderswood
n 1: tree of India and East Indies yielding a hard fragrant
timber prized for cabinetwork and dark red heartwood used
as a dyewood [syn: red sandalwood, red sanders, {red
sanderswood}, red saunders, Pterocarpus santalinus]