mesacuac.

(a loanword from Spanish)

Headword: 
mesacuac.
Principal English Translation: 

the head of the table (partly a loanword from Spanish, mesa, table; see Molina)

Orthographic Variants: 
mesaquac
Alonso de Molina: 

mesaquac. cabecera de mesa
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.