guayule From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounParthenium argentatum, a flowering shrub in the aster family. Related wordsSynonymsparthenium argentatumguayacanragwortsundancecuichunchulliyaretachicaloteanthericumageratummat amaranthmargueritesalalashweedapache plumetolaguapilla References Wiktionary — guayule Wikipedia — guayule