a glowworm, or a firefly (see Karttunen)
XOXŌTLANI glowworm, firefly / cocuyo, luciérnaga (Z) [(2)Zp.77,230, (3)Xp.105]. X has MĒTZ for NI and adds final -TZIN. See XŌTLA. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 332.