xoconostle or joconostle or soconostle. ( From nahuatl xoconochtli, literally = ' tuna sour ' of xococ ' sour ' nochtli ' tuna '. ) PRONUNC. This x is pronounced/sh /. m. sour prickly pear which is used only in the manufacture of sweets in syrup or covered. Your Cactus ( plant ) It is the Opuntia genus and is also called xoconostle. Source: Guido Gómez de SilvaDICCIONARIO brief of MEXICANISMS ( 1st ed., Mexico, FCE, 2001 )