蝹:
1. (verb) To move in a winding and coiling manner, as in "moving like a divine dragon ascending and descending."
2. (noun) A legendary monster that eats human brains underground.
Reference: "Guangyun, Upper Tone, Haoyun" states, "蝹 is a name for an insect. Like a monkey, it usually feeds on human brains underground."
From Ren Fang's "Record of Strange Things," Southern Dynasties, it mentions "During the time of Lord Miao of Qin, a person from Chen Cang dug underground and found a creature that resembled neither a sheep nor a pig. Lord Miao met two boys on the road, who said: 'This is called 蝹, it lives underground and eats human brains.'"