the flesh of the top of the head; may refer to the crest or comb on a rooster or a hen (see Molina, and see cuanacatl)
Orthographic Variants:
quanacayotl
Alonso de Molina:
quanacayotl. la carne del caxco dela cabeza. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 85r. col. 1. Thanks to Joe Campbell for providing the transcription.