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The Collaborative International Dictionary of English v.0.48 (gcide)

Ule \U"le\ ([=u]"l[-e]), n. [Sp.] (Bot.)
A Mexican and Central American tree ({Castilloa elastica} and
{Castilloa Markhamiana}) related to the breadfruit tree. Its
milky juice contains {caoutchouc}. Called also {ule tree}.
[1913 Webster]


Caoutchouc \Caout"chouc\, n. [F. caoutchouc, from the South
American name.]
A tenacious, elastic, gummy substance obtained from the milky
sap of several plants of tropical South America (esp. the
euphorbiaceous tree {Siphonia elastica} or {Hevea
caoutchouc}), Asia, and Africa. Being impermeable to liquids
and gases, and not readly affected by exposure to air, acids,
and alkalies, it is used, especially when vulcanized, for
many purposes in the arts and in manufactures. Also called
{India rubber} (because it was first brought from India, and
was formerly used chiefly for erasing pencil marks) and {gum
elastic}. See {Vulcanization}.
[1913 Webster]

{Mineral caoutchouc}. See under {Mineral}.
[1913 Webster]

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