sentences:  Another hypothesis suggests that "Mēxihco" derives from a portmanteau of the Nahuatl words for "moon" ("mētztli") and navel ("xīctli").This meaning ("Place at the Center of the Moon") might then refer to Tenochtitlan's position in the middle of Lake Texcoco.The system of interconnected lakes, of which Texcoco formed the center, had the form of a rabbit, which the Mesoamericans pareidolically associated with the moon.