a signal made with the palm of their hand (see Molina)
Orthographic Variants:
macpalmachiotl
Alonso de Molina:
macpalmachiotl. señal hecha con la palma de la mano. 71m2-51r. col. 1. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. Thanks to Joe Campbell for providing the transcription.