a steel filing instrument, filing tool (see Molina)
Orthographic Variants:
tepuz ichiconi
Alonso de Molina:
tepuz ichiconi. lima de azero. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 103v. col. 2. Thanks to Joe Campbell for providing the transcription.