a field of melons (partially a loanword from Spanish, melón (see Molina); milpa is milli with a directional suffix
Orthographic Variants:
melon milpa
Alonso de Molina:
melon milpa. melonar. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 55v. col. 1. Thanks to Joe Campbell for providing the transcription.