a toothpick or a device to scratch one's teeth (see Molina)
Orthographic Variants:
netlan cuicuiuani
Alonso de Molina:
netlan cuicuiuani. escaruadientes, o mondadientes. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 70v. col. 1. Thanks to Joe Campbell for providing the transcription.