an armadillo shell (see Karttunen)
ĀYŌTŌCHCACAHUA-TL armadillo shell / concha de armadillo (Z) [(1)Zp.142]. See ĀYŌTŌCH-IN, CACAHUA-TL. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 17.