a sieve, a strainer, or bran; perhaps the tools were used to separate the bran from the grain (SW)
Alonso de Molina:
tlatzetzeliuhcayotl. harnero, cedazo o triua, o afrechos. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 142v. col. 2. Thanks to Joe Campbell for providing the transcription.