the scalp (see Molina); literally, the skin of the head
Orthographic Variants:
quaehuayotl, quaeuayotl
Alonso de Molina:
quaeuayotl. el cuero dela cabeza. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 84r. col. 2. Thanks to Joe Campbell for providing the transcription.