tochichi.

Headword: 
tochichi.
Principal English Translation: 

lung(s) (see attestations, Lockhart); or, lights?; or, saliva and spittoon? (see Molina)

Alonso de Molina: 

tochichi. bofes, o liuianos, o la saliua y escopetina.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 148r. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

ca much vncā [fol.31] icuiliuhtoc in tzontecomatl, nacaztli, iollotli, cuitlaxculli eltapachtli, tochichi, macpalli, xocpalli = for there were painted all severed heads, ears, hearts, entrails, livers, lungs, hands and feet (Mexico City, sixteenth century)
James Lockhart, We People Here: Nahuatl Accounts of the Conquest of Mexico, Repertorium Columbianum v. 1 (Los Angeles: UCLA Center for Medieval and Renaissance Studies, 1993), 128.

themes: 
Anatomy