[gwah-yoo-lee, wah-; Spanish gwah-yoo-le]
noun, plural guayules [gwah-yoo-leez, wah-; Spanish gwah-yoo-les] .
a composite shrub, Parthenium argentatum, of the southwestern U.S. and Mexico, yielding a form of rubber.
the rubber obtained from this plant.

1905–10, Americanism; < Mexican Spanish < Nahuatl cuauholli or huauholli, equivalent to cuahu(itl) tree or huauh(tli) amaranth + olli rubber Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
guayule (ɡwəˈjuːlɪ)
1.  a bushy shrub, Parthenium argentatum, of the southwestern US: family Asteraceae (composites)
2.  rubber derived from the sap of this plant
[from American Spanish, from Nahuatl cuauhuli, from cuahuitl tree + uli gum]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Encyclopedia Britannica


rubber-containingrubber-containing desert shrub of the family Asteraceae, native to the north-central plateau of Mexico and the Big Bend area of Texas. It has small white flowers and narrow silvery leaves that alternate along the stem. Prehistoric Indians are believed to have obtained rubber by chewing the bark of the plant. The modern method is to macerate the shrub mechanically.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Two species in particular that show potential are the jojoba and the guayule.
Determining ploidy level in guayule breeding populations.
The project was successful in exploring the potential of guayule rubber, but met market resistance.
Growth, rubber, and resin evaluation of two-year-old transgenic guayule.
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