sorrel, an herb, or a type of perennial plant (see Molina)
Orthographic Variants:
xocoyulli, xucoyulli
Alonso de Molina:
xucoyulli. azederas. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 162r. col. 1. Thanks to Joe Campbell for providing the transcription.