tecuacua xillanhuipilli.

Headword: 
tecuacua xillanhuipilli.
Principal English Translation: 

silicon (?) (see Molina)

Orthographic Variants: 
tequaqua xillanuipilli, tequaqua xillanhuipilli.
Alonso de Molina: 

tequaqua xillanuipilli. silicio.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 105r. col. 1. Thanks to Joe Campbell for providing the transcription.