資料來源 : Webster's Revised Unabridged Dictionary (1913)
Tar \Tar\, n. [OE. terre, tarre, AS. teru, teoru; akin to D.
teer, G. teer, theer, Icel. tjara, Sw. tj["a]ra, Dan.
ti[ae]re, and to E. tree. [root]63. See {Tree}.]
A thick, black, viscous liquid obtained by the distillation
of wood, coal, etc., and having a varied composition
according to the temperature and material employed in
obtaining it.
{Coal tar}. See in the Vocabulary.
{Mineral tar} (Min.), a kind of soft native bitumen.
{Tar board}, a strong quality of millboard made from junk and
old tarred rope. --Knight.
{Tar water}.
(a) A cold infusion of tar in water, used as a medicine.
(b) The ammoniacal water of gas works.
{Wood tar}, tar obtained from wood. It is usually obtained by
the distillation of the wood of the pine, spruce, or fir,
and is used in varnishes, cements, and to render ropes,
oakum, etc., impervious to water.
資料來源 : WordNet®
mineral tar
n : a thick black tar intermediate between petroleum and asphalt
[syn: {maltha}]