/gwah yooh"lee, wah-/ ; Sp. /gwah yooh"le/ , n. , pl. guayules /-leez/ ; Sp. /-les/ .
1. a composite shrub, Parthenium argentatum, of the southwestern U.S. and Mexico, yielding a form of rubber.
2. the rubber obtained from this plant.
[ 1905-10, Amer.; cuauholli or huauholli, equiv. to cuahu ( itl ) tree or huauh ( tli ) amaranth + olli rubber ]