tocihuitl

the feather of a bird of yellow color (from the toztli bird), used for rites, dance, and "sorcery"
A. Wimmer, citing Garibay, and published in the Gran Diccionario Náhuatl, https://gdn.iib.unam.mx/diccionario/tocihuitl/73946. Translation to English by Stephanie Wood.
The orthographic variant with the "z" has not yet been attested, but we are including it here given that the feather comes from the toz(tli) bird.