eilhuitica.

Headword: 
eilhuitica.
Principal English Translation: 

on the third day (see Molina)

Orthographic Variants: 
yeihuitica
Alonso de Molina: 

eilhuitica. altercero dia.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 28r. col. 2. Thanks to Joe Campbell for providing the transcription.