conch shell trumpet (see Karttunen and Molina); conch horn (see attestations)
IPAspelling:
kikistɬi
Alonso de Molina:
quiquiztli. bozina de caracol, o caracol que sirue de bozina, o de trompeta. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 90r. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
QUIQUIZ-TLI conch shell trumpet / bocina de caracol, o caracol que sirve de bocina o de trompeta (M) [(3)Cf.104r,109r,120r]. See QUIQUIC(I). Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 212.