poxcauhcayotl.

Headword: 
poxcauhcayotl.
Principal English Translation: 

bread mold, or the like (see Molina)

Alonso de Molina: 

poxcauhcayotl. moho de pan, o de cosa semejante.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 83v. col. 1. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

See an image that represents poxcauhcayotl in the Visual Lexicon of Aztec Hieroglyphs, ed. Stephanie Wood (Eugene, Ore.: Wired Humanities, 2020-present).

The Codex Mendoza has a simplex hieroglyph for the town named Puxcauhtlan (Poxcauhtlan), which resembles a flower on its side with multi-colored mold. https://aztecglyphs.wired-humanities.org/content/poxcauhtlan-10v