apetztlalli.

Headword: 
apetztlalli.
Principal English Translation: 

ground iron pyrite
See the Digital Florentine Codex, Book 11, folio 216 recto; https://florentinecodex.getty.edu/book/11/folio/216r

Attestations from sources in English: 

The use of -tlalli to refer to ground stone is not unusual. Other examples are found in Book 11 of the Florentine Codex. (SW)