something stretched or enlarged, or something with the crust or bark removed, or an ear of corn or maize with its leaves removed, etc. (see Molina)
Alonso de Molina:
tlacoyauhtli. cosa ensanchada assi, o descortezada, o mazorca de mayz deshojada, o cosas semejantes. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 118v. col. 1. Thanks to Joe Campbell for providing the transcription.