an opening in a wall of defense from which to shoot (see Molina)
Alonso de Molina:
tlequiquiz tlacoyoctli. tronera. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 147v. col. 1. Thanks to Joe Campbell for providing the transcription.